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            創新工場筆試算法題附答案

            時間:2024-10-17 21:33:04 面試筆試 我要投稿
            • 相關推薦

            創新工場2014筆試算法題匯總附答案

               1. 編程實現堆排序

            創新工場2014筆試算法題匯總附答案

              #include

              usingnamespace std;

              void SwapValue(int &m, int &n)

              {

              int temp = m;

              m = n;

              n = temp;

              }

              void max_heap(vector &vec, int i, int heap_size)

              {

              int l = 2*i;

              int r = 2*i+1;

              int largest = i;

              if(l<=heap_size && vec[l-1]>vec[largest-1])

              largest = l;

              if(r<=heap_size && vec[r-1]>vec[largest-1])

              largest = r;

              if(largest!=i)

              {

              SwapValue(vec[largest-1],vec[i-1]);

              max_heap(vec, largest, heap_size);

              }

              }

              void heapSort(vector &vec)

              {

              int heap_size = vec.size();

              for(int i=heap_size/2; i>=1; i–)

              max_heap(vec, i, heap_size);

              for(int i=heap_size; i>=1; i–)

              {

              SwapValue(vec[0],vec[i-1]);

              max_heap(vec, 1, i);

              }

              }

              void print(vector vec)

              {

              for(int i=0; i

              cout<

              cout<

              }

              int main()

              {

              vector vec;

              vec.push_back(23);

              vec.push_back(5);

              vec.push_back(1);

              vec.push_back(10);

              vec.push_back(13);

              vec.push_back(32);

              vec.push_back(21);

              vec.push_back(14);

              vec.push_back(19);

              vec.push_back(20);

              cout<<“排序前: “<

              print(vec);

              heapSort(vec);

              cout<<“排序后: “<

              print(vec);

              return 0;

              }

              2.求一個正整數N的開方,要求不能用庫函數sqrt(),結果的精度在0.001

              解析:牛頓迭代

              #include

              using namespace std;

              int main()

              {

              int N;

              cout<<“輸入N的值:“;

              cin>>N

              double x1 = 1;//初值

              double x2 = x1/2.0+N/2.0/x1;

              while( fabs(x2-x1)>0.001)

              {

              x1 = x2;

              x2 = x1/2.0+N/2.0/x1;

              }

              cout<

              return 0;

              }

              3.給定一個矩陣intmaxtrixA[m][n],每行和每列都是增序的,實現一個算法去找矩陣中的某個元素element.

              解法一:

              #include

              using namespace std;

              const int M = 4;

              const int N = 4;

              int main

              {

              int matrix[M][N] = {};

              double element;

              int flag = 1;

              for(int j=0; j

              {

              if(matrix[i][j] == element)

              cout<<“位置“<

              while( flag

              –flag;

              while( flagelement )

              ++flag;

              }

              }

              解法二:

              bool Find(int *matrixA, int m, int n, int element)

              {

              bool found = false;

              if(matrixA != NULL & m & n)

              {

              int i,j;

              i=0;j=n-1;

              while(i

              {

              if(maxtrixA[i*n+j] == element)

              {

              found = true;

              break;

              }

              else if(matrix[i*n+j]>element

              –j;

              else

              ++i

              }

              }

              }

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