## Coin Flip
This is a coin flipping game where you need to build up your winning streak by guessing the outcome of a coin flip. To complete this level you'll need to use your psychic abilities to guess the correct outcome 10 times in a row.

// SPDX-License-Identifier: MIT
pragma ever-solidity >= 0.71.0;

interface Resolvable {
    function isSolved() external view returns (bool);
}

interface CoinFlip {
    function flip(bool) external responsible returns (bool);
}

contract Challenge is Resolvable, CoinFlip {
    uint4 public count;

    constructor() {
        require(tvm.pubkey() != 0, 101);
        require(msg.pubkey() == tvm.pubkey(), 102);
        tvm.accept();
        count = 0;
    }

    function flip(bool guess) external responsible returns (bool) {
        uint8 coinFlip = rnd.next(100);
        bool side = coinFlip > 50 ? true : false;
        if (side == guess) {
            count++;
        } else {
            count = 0;
        }
        return {value: 0, bounce: false, flag: 64} side;
    }

    function isSolved() external view returns (bool) {
        return count >= 10;
    }
}

## Note

- https://www.google.com/search?q=paradigm+ctf+2023
- https://github.com/paradigmxyz/paradigm-ctf-infrastructure
- https://github.com/Zellic/example-ctf-challenge
- https://github.com/paradigmxyz/paradigm-ctf-2022
- https://medium.com/amber-group/web3-hacking-paradigm-ctf-2022-writeup-3102944fd6f5
- 0xMonaco
- https://github.com/saucepoint/0xMonaco
- https://hackmd.io/@onemanbandplus2/S1Ez1Ulys
- https://hackmd.io/@t11s/monaco-elo
- https://www.damnvulnerabledefi.xyz/
- https://capturetheether.com/
- https://cryptohack.org/
- https://www.useweb3.xyz/code-challenges
- https://ethernaut.openzeppelin.com/