```move
module solve::solve {

// [*] Import dependencies
use challenge::Otter::{Self, OTTER};
use sui::random::Random;

#[allow(lint(public_random))]
public fun solve(
_vault: &mut Otter::Vault<OTTER>,
_questboard: &mut Otter::QuestBoard,
_player: &mut Otter::Player,
_r: &Random,
_ctx: &mut TxContext,
) {
let mut i = 0;
while (i < 10) {
Otter::buy_sword(_vault, _player, _ctx);

let mut j = 0;
while (j < 25) {
Otter::find_a_monster(_questboard, _r, _ctx);
j = j + 1;
};

Otter::fight_monster(_questboard, _player, 0);
Otter::return_home(_questboard, 0);

let mut j = 0;
while (j < 25) {
Otter::get_the_reward(_vault, _questboard, _player, 0, _ctx);
j = j + 1;
};

i = i + 1;
};

let flag = Otter::buy_flag(_vault, _player, _ctx);
Otter::prove(_questboard, flag);
}

}
```