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</div>
</template>
</div>
<include-fragment class="js-notification-shelf-include-fragment" data-base-src="https://github.com/notifications/beta/shelf"></include-fragment>
<div
class="application-main "
data-commit-hovercards-enabled
data-discussion-hovercards-enabled
data-issue-and-pr-hovercards-enabled
>
<div itemscope itemtype="http://schema.org/SoftwareSourceCode" class="">
<main id="js-repo-pjax-container" data-pjax-container >
<include-fragment src="/orgs/csivitu/survey_banner" data-test-selector="survey-banner-selector">
</include-fragment>
<div id="repository-container-header" class="pt-3 hide-full-screen mb-5" style="background-color: var(--color-page-header-bg);" data-pjax-replace>
<div class="d-flex mb-3 px-3 px-md-4 px-lg-5">
<div class="flex-auto min-width-0 width-fit mr-3">
<h1 class=" d-flex flex-wrap flex-items-center wb-break-word f3 text-normal">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo color-icon-secondary mr-2">
<path fill-rule="evenodd" d="M2 2.5A2.5 2.5 0 014.5 0h8.75a.75.75 0 01.75.75v12.5a.75.75 0 01-.75.75h-2.5a.75.75 0 110-1.5h1.75v-2h-8a1 1 0 00-.714 1.7.75.75 0 01-1.072 1.05A2.495 2.495 0 012 11.5v-9zm10.5-1V9h-8c-.356 0-.694.074-1 .208V2.5a1 1 0 011-1h8zM5 12.25v3.25a.25.25 0 00.4.2l1.45-1.087a.25.25 0 01.3 0L8.6 15.7a.25.25 0 00.4-.2v-3.25a.25.25 0 00-.25-.25h-3.5a.25.25 0 00-.25.25z"></path>
</svg>
<span>
csivitu
</span>
<span>/</span>
CTF-Write-ups
<span></span><span>Public</span>
</h1>
</div>
</div>
<div id="responsive-meta-container" data-pjax-replace>
</div>
<nav data-pjax="#js-repo-pjax-container" aria-label="Repository" data-view-component="true" class="js-repo-nav js-sidenav-container-pjax js-responsive-underlinenav overflow-hidden UnderlineNav px-3 px-md-4 px-lg-5">
</details-menu></div>
</details></div>
</nav>
</div>
<div class="clearfix new-discussion-timeline container-xl px-3 px-md-4 px-lg-5">
<div id="repo-content-pjax-container" class="repository-content " >
<div>
<div class="file-navigation mb-3 d-flex flex-items-start">
<div class="position-relative">
<details class="details-reset details-overlay mr-0 mb-0 " id="branch-select-menu">
<summary class="btn css-truncate"
data-hotkey="w"
title="Switch branches or tags">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-git-branch">
<path fill-rule="evenodd" d="M11.75 2.5a.75.75 0 100 1.5.75.75 0 000-1.5zm-2.25.75a2.25 2.25 0 113 2.122V6A2.5 2.5 0 0110 8.5H6a1 1 0 00-1 1v1.128a2.251 2.251 0 11-1.5 0V5.372a2.25 2.25 0 111.5 0v1.836A2.492 2.492 0 016 7h4a1 1 0 001-1v-.628A2.25 2.25 0 019.5 3.25zM4.25 12a.75.75 0 100 1.5.75.75 0 000-1.5zM3.5 3.25a.75.75 0 111.5 0 .75.75 0 01-1.5 0z"></path>
</svg>
<span>master</span>
<span></span>
</summary>
<div class="SelectMenu">
<div class="SelectMenu-modal">
<header class="SelectMenu-header">
<span>Switch branches/tags</span>
<button class="SelectMenu-closeButton" type="button" data-toggle-for="branch-select-menu"><svg aria-label="Close menu" aria-hidden="false" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x">
<path fill-rule="evenodd" d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"></path>
</svg></button>
</header>
<input-demux data-action="tab-container-change:input-demux#storeInput tab-container-changed:input-demux#updateInput">
<tab-container class="d-flex flex-column js-branches-tags-tabs" style="min-height: 0;">
<div class="SelectMenu-filter">
<input data-target="input-demux.source"
id="context-commitish-filter-field"
class="SelectMenu-input form-control"
aria-owns="ref-list-branches"
data-controls-ref-menu-id="ref-list-branches"
autofocus
autocomplete="off"
aria-label="Filter branches/tags"
placeholder="Filter branches/tags"
type="text"
>
</div>
<div class="SelectMenu-tabs" role="tablist" data-target="input-demux.control" >
<button class="SelectMenu-tab" type="button" role="tab" aria-selected="true">Branches</button>
<button class="SelectMenu-tab" type="button" role="tab">Tags</button>
</div>
<div role="tabpanel" id="ref-list-branches" data-filter-placeholder="Filter branches/tags" class="d-flex flex-column flex-auto overflow-auto" tabindex="">
<ref-selector
type="branch"
data-targets="input-demux.sinks"
data-action="
input-entered:ref-selector#inputEntered
tab-selected:ref-selector#tabSelected
focus-list:ref-selector#focusFirstListMember
"
query-endpoint="/csivitu/CTF-Write-ups/refs"
cache-key="v0:1633249178.568328"
current-committish="bWFzdGVy"
default-branch="bWFzdGVy"
name-with-owner="Y3Npdml0dS9DVEYtV3JpdGUtdXBz"
prefetch-on-mouseover
>
<template data-target="ref-selector.fetchFailedTemplate">
<div class="SelectMenu-message" data-index="{{ index }}">Could not load branches</div>
</template>
<template data-target="ref-selector.noMatchTemplate">
<div class="SelectMenu-message">Nothing to show</div>
</template>
<div data-target="ref-selector.listContainer" role="menu" class="SelectMenu-list " style="max-height: 330px" data-pjax="#repo-content-pjax-container">
<div class="SelectMenu-loading pt-3 pb-0" aria-label="Menu is loading">
<svg style="box-sizing: content-box; color: var(--color-icon-primary);" width="32" height="32" viewBox="0 0 16 16" fill="none" data-view-component="true" class="anim-rotate">
<circle cx="8" cy="8" r="7" stroke="currentColor" stroke-opacity="0.25" stroke-width="2" vector-effect="non-scaling-stroke" />
<path d="M15 8a7.002 7.002 0 00-7-7" stroke="currentColor" stroke-width="2" stroke-linecap="round" vector-effect="non-scaling-stroke" />
</svg>
</div>
</div>
<template data-target="ref-selector.itemTemplate">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check SelectMenu-icon SelectMenu-icon--check">
<path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path>
</svg>
<span>{{ refName }}</span>
<span>default</span>
</template>
<footer class="SelectMenu-footer">View all branches</footer>
</ref-selector>
</div>
<div role="tabpanel" id="tags-menu" data-filter-placeholder="Find a tag" class="d-flex flex-column flex-auto overflow-auto" tabindex="" hidden>
<ref-selector
type="tag"
data-action="
input-entered:ref-selector#inputEntered
tab-selected:ref-selector#tabSelected
focus-list:ref-selector#focusFirstListMember
"
data-targets="input-demux.sinks"
query-endpoint="/csivitu/CTF-Write-ups/refs"
cache-key="v0:1633249178.568328"
current-committish="bWFzdGVy"
default-branch="bWFzdGVy"
name-with-owner="Y3Npdml0dS9DVEYtV3JpdGUtdXBz"
>
<template data-target="ref-selector.fetchFailedTemplate">
<div class="SelectMenu-message" data-index="{{ index }}">Could not load tags</div>
</template>
<template data-target="ref-selector.noMatchTemplate">
<div class="SelectMenu-message" data-index="{{ index }}">Nothing to show</div>
</template>
<template data-target="ref-selector.itemTemplate">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check SelectMenu-icon SelectMenu-icon--check">
<path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path>
</svg>
<span>{{ refName }}</span>
<span>default</span>
</template>
<div data-target="ref-selector.listContainer" role="menu" class="SelectMenu-list" style="max-height: 330px" data-pjax="#repo-content-pjax-container">
<div class="SelectMenu-loading pt-3 pb-0" aria-label="Menu is loading">
<svg style="box-sizing: content-box; color: var(--color-icon-primary);" width="32" height="32" viewBox="0 0 16 16" fill="none" data-view-component="true" class="anim-rotate">
<circle cx="8" cy="8" r="7" stroke="currentColor" stroke-opacity="0.25" stroke-width="2" vector-effect="non-scaling-stroke" />
<path d="M15 8a7.002 7.002 0 00-7-7" stroke="currentColor" stroke-width="2" stroke-linecap="round" vector-effect="non-scaling-stroke" />
</svg>
</div>
</div>
<footer class="SelectMenu-footer">View all tags</footer>
</ref-selector>
</div>
</tab-container>
</input-demux>
</div>
</div>
</details>
</div>
<div class="flex-1 mx-2 flex-self-center f4">
<div class="d-none d-sm-block">
<span><span><span>CTF-Write-ups</span></span></span><span>/</span><span><span>DarkCTF 2020</span></span><span>/</span><span><span>Crypto</span></span><span>/</span>Weird Encryption<span>/</span>
</div>
</div>
<div class="d-flex">
Go to file
</div>
</div>
<div class="f4 mt-3 mb-3 d-sm-none"><span><span><span>CTF-Write-ups</span></span></span><span>/</span><span><span>DarkCTF 2020</span></span><span>/</span><span><span>Crypto</span></span><span>/</span>Weird Encryption<span>/</span></div>
<div class="Box mb-3">
<div class="Box-header position-relative">
<h2 class="sr-only">Latest commit</h2>
<div class="js-details-container Details d-flex rounded-top-1 flex-items-center flex-wrap" data-issue-and-pr-hovercards-enabled>
<include-fragment src="/csivitu/CTF-Write-ups/tree-commit/875308b9ecab6847c44dbfa3e4ab8d9fccaad50d/DarkCTF%202020/Crypto/Weird%20Encryption" class="d-flex flex-auto flex-items-center" aria-busy="true" aria-label="Loading latest commit">
<div class="Skeleton avatar avatar-user flex-shrink-0 ml-n1 mr-n1 mt-n1 mb-n1" style="width:24px;height:24px;"></div>
<div class="Skeleton Skeleton--text col-5 ml-3"> </div>
</include-fragment> <div class="flex-shrink-0">
<h2 class="sr-only">Git stats</h2>
<include-fragment src="/csivitu/CTF-Write-ups/file-list/master/DarkCTF%202020/Crypto/Weird%20Encryption">
Permalink
<div data-view-component="true" class="include-fragment-error flash flash-error flash-full py-2">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert">
<path fill-rule="evenodd" d="M8.22 1.754a.25.25 0 00-.44 0L1.698 13.132a.25.25 0 00.22.368h12.164a.25.25 0 00.22-.368L8.22 1.754zm-1.763-.707c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0114.082 15H1.918a1.75 1.75 0 01-1.543-2.575L6.457 1.047zM9 11a1 1 0 11-2 0 1 1 0 012 0zm-.25-5.25a.75.75 0 00-1.5 0v2.5a.75.75 0 001.5 0v-2.5z"></path>
</svg>
Failed to load latest commit information.
</div> <div class="js-details-container Details">
<div role="grid" aria-labelledby="files" class="Details-content--hidden-not-important js-navigation-container js-active-navigation-container d-block" data-pjax>
<div class="sr-only" role="row">
<div role="columnheader">Type</div>
<div role="columnheader">Name</div>
<div role="columnheader" class="d-none d-md-block">Latest commit message</div>
<div role="columnheader">Commit time</div>
</div>
<div role="row" class="Box-row Box-row--focus-gray p-0 d-flex js-navigation-item" >
<div role="rowheader" class="flex-auto min-width-0 col-md-2">
<span>. .</span>
</div>
<div role="gridcell" class="d-none d-md-block"></div>
<div role="gridcell"></div>
</div>
<div role="row" class="Box-row Box-row--focus-gray py-2 d-flex position-relative js-navigation-item ">
<div role="gridcell" class="mr-3 flex-shrink-0" style="width: 16px;">
<svg aria-label="File" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file color-icon-tertiary">
<path fill-rule="evenodd" d="M3.75 1.5a.25.25 0 00-.25.25v11.5c0 .138.112.25.25.25h8.5a.25.25 0 00.25-.25V6H9.75A1.75 1.75 0 018 4.25V1.5H3.75zm5.75.56v2.19c0 .138.112.25.25.25h2.19L9.5 2.06zM2 1.75C2 .784 2.784 0 3.75 0h5.086c.464 0 .909.184 1.237.513l3.414 3.414c.329.328.513.773.513 1.237v8.086A1.75 1.75 0 0112.25 15h-8.5A1.75 1.75 0 012 13.25V1.75z"></path>
</svg>
</div>
<div role="rowheader" class="flex-auto min-width-0 col-md-2 mr-3">
<span>Encrypted</span>
</div>
<div role="gridcell" class="flex-auto min-width-0 d-none d-md-block col-5 mr-3" >
<div class="Skeleton Skeleton--text col-7"> </div>
</div>
<div role="gridcell" class="color-fg-muted text-right" style="width:100px;">
<div class="Skeleton Skeleton--text"> </div>
</div>
</div>
<div role="row" class="Box-row Box-row--focus-gray py-2 d-flex position-relative js-navigation-item ">
<div role="gridcell" class="mr-3 flex-shrink-0" style="width: 16px;">
<svg aria-label="File" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file color-icon-tertiary">
<path fill-rule="evenodd" d="M3.75 1.5a.25.25 0 00-.25.25v11.5c0 .138.112.25.25.25h8.5a.25.25 0 00.25-.25V6H9.75A1.75 1.75 0 018 4.25V1.5H3.75zm5.75.56v2.19c0 .138.112.25.25.25h2.19L9.5 2.06zM2 1.75C2 .784 2.784 0 3.75 0h5.086c.464 0 .909.184 1.237.513l3.414 3.414c.329.328.513.773.513 1.237v8.086A1.75 1.75 0 0112.25 15h-8.5A1.75 1.75 0 012 13.25V1.75z"></path>
</svg>
</div>
<div role="rowheader" class="flex-auto min-width-0 col-md-2 mr-3">
<span>enc.py</span>
</div>
<div role="gridcell" class="flex-auto min-width-0 d-none d-md-block col-5 mr-3" >
<div class="Skeleton Skeleton--text col-7"> </div>
</div>
<div role="gridcell" class="color-fg-muted text-right" style="width:100px;">
<div class="Skeleton Skeleton--text"> </div>
</div>
</div>
<div role="row" class="Box-row Box-row--focus-gray py-2 d-flex position-relative js-navigation-item ">
<div role="gridcell" class="mr-3 flex-shrink-0" style="width: 16px;">
<svg aria-label="File" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file color-icon-tertiary">
<path fill-rule="evenodd" d="M3.75 1.5a.25.25 0 00-.25.25v11.5c0 .138.112.25.25.25h8.5a.25.25 0 00.25-.25V6H9.75A1.75 1.75 0 018 4.25V1.5H3.75zm5.75.56v2.19c0 .138.112.25.25.25h2.19L9.5 2.06zM2 1.75C2 .784 2.784 0 3.75 0h5.086c.464 0 .909.184 1.237.513l3.414 3.414c.329.328.513.773.513 1.237v8.086A1.75 1.75 0 0112.25 15h-8.5A1.75 1.75 0 012 13.25V1.75z"></path>
</svg>
</div>
<div role="rowheader" class="flex-auto min-width-0 col-md-2 mr-3">
<span>solve.py</span>
</div>
<div role="gridcell" class="flex-auto min-width-0 d-none d-md-block col-5 mr-3" >
<div class="Skeleton Skeleton--text col-7"> </div>
</div>
<div role="gridcell" class="color-fg-muted text-right" style="width:100px;">
<div class="Skeleton Skeleton--text"> </div>
</div>
</div>
</div>
</div>
</include-fragment>
</div>
</div>
</div>
</div>
</main>
</div>
</div>
<div class="footer container-xl width-full p-responsive" role="contentinfo">
<div class="position-relative d-flex flex-row-reverse flex-lg-row flex-wrap flex-lg-nowrap flex-justify-center flex-lg-justify-between pt-6 pb-2 mt-6 f6 color-fg-muted border-top color-border-muted ">
<div id="ajax-error-message" class="ajax-error-message flash flash-error" hidden>
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert">
<path fill-rule="evenodd" d="M8.22 1.754a.25.25 0 00-.44 0L1.698 13.132a.25.25 0 00.22.368h12.164a.25.25 0 00.22-.368L8.22 1.754zm-1.763-.707c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0114.082 15H1.918a1.75 1.75 0 01-1.543-2.575L6.457 1.047zM9 11a1 1 0 11-2 0 1 1 0 012 0zm-.25-5.25a.75.75 0 00-1.5 0v2.5a.75.75 0 001.5 0v-2.5z"></path>
</svg>
<button type="button" class="flash-close js-ajax-error-dismiss" aria-label="Dismiss error">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x">
<path fill-rule="evenodd" d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"></path>
</svg>
</button>
You can’t perform that action at this time.
</div>
<div class="js-stale-session-flash flash flash-warn flash-banner" hidden
>
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert">
<path fill-rule="evenodd" d="M8.22 1.754a.25.25 0 00-.44 0L1.698 13.132a.25.25 0 00.22.368h12.164a.25.25 0 00.22-.368L8.22 1.754zm-1.763-.707c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0114.082 15H1.918a1.75 1.75 0 01-1.543-2.575L6.457 1.047zM9 11a1 1 0 11-2 0 1 1 0 012 0zm-.25-5.25a.75.75 0 00-1.5 0v2.5a.75.75 0 001.5 0v-2.5z"></path>
</svg>
<span>You signed in with another tab or window. Reload to refresh your session.</span>
<span>You signed out in another tab or window. Reload to refresh your session.</span>
</div>
<template id="site-details-dialog">
<details class="details-reset details-overlay details-overlay-dark lh-default color-fg-default hx_rsm" open>
<summary role="button" aria-label="Close dialog"></summary>
<details-dialog class="Box Box--overlay d-flex flex-column anim-fade-in fast hx_rsm-dialog hx_rsm-modal">
<button class="Box-btn-octicon m-0 btn-octicon position-absolute right-0 top-0" type="button" aria-label="Close dialog" data-close-dialog>
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x">
<path fill-rule="evenodd" d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"></path>
</svg>
</button>
<div class="octocat-spinner my-6 js-details-dialog-spinner"></div>
</details-dialog>
</details>
</template>
<div class="Popover js-hovercard-content position-absolute" style="display: none; outline: none;" tabindex="0">
<div class="Popover-message Popover-message--bottom-left Popover-message--large Box color-shadow-large" style="width:360px;">
</div>
</div>
<template id="snippet-clipboard-copy-button">
<div class="zeroclipboard-container position-absolute right-0 top-0">
<clipboard-copy aria-label="Copy" class="ClipboardButton btn js-clipboard-copy m-2 p-0 tooltipped-no-delay" data-copy-feedback="Copied!" data-tooltip-direction="w">
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copy js-clipboard-copy-icon m-2">
<path fill-rule="evenodd" d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 010 1.5h-1.5a.25.25 0 00-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 00.25-.25v-1.5a.75.75 0 011.5 0v1.5A1.75 1.75 0 019.25 16h-7.5A1.75 1.75 0 010 14.25v-7.5z"></path><path fill-rule="evenodd" d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0114.25 11h-7.5A1.75 1.75 0 015 9.25v-7.5zm1.75-.25a.25.25 0 00-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 00.25-.25v-7.5a.25.25 0 00-.25-.25h-7.5z"></path>
</svg>
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check js-clipboard-check-icon color-text-success d-none m-2">
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</svg>
</clipboard-copy>
</div>
</template>
</body>
</html>