Function exist

CPP/questions/word-search.cpp:34–44

}

bool exist(vector<vector<char>> &board, string word) {
    
    for(int i=0; i < board.size(); i++) {
        for(int j = 0; j < board[0].size(); j++) {
            if(solve(board, word, 0, i, j))
                return true;
        }
    }

    return false;
}

int main() {
    vector<vector<char>> board = {