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  1. #include <iomanip>
  2. #include <iostream>
  3. #include<algorithm>
  4. #include <math.h>
  5. #include<assert.h>
  6. #include<cmath>
  7. #include<string>
  8. #include<string.h>
  9. #include <vector>
  10. using namespace std;
  11. int main()
  12. {
  13.     std::ios_base::sync_with_stdio(0);
  14.     cin.tie(NULL);
  15.     cout.tie(0);
  16.     int raw1 = 0;
  17.     int col1 = 0;
  18.     int raw2 = 0;
  19.     int col2 = 0;
  20.     cin >> raw1 >> col1;
  21.     vector <vector<int>>arr1(raw1,vector<int>(col1));
  22.  
  23.  
  24.  
  25.     for (int i = 0; i <raw1; i++)
  26.     {
  27.         for (int j = 0; j < col1; j++)
  28.         {
  29.            cin>>arr1[i][j];
  30.         }
  31.     }
  32.     cin >> raw2 >> col2;
  33.     vector<vector<int>>arr2(raw2, vector<int >(col2));
  34.     vector<vector<int>>arr3(col1, vector<int>(raw2));
  35.     for (int i = 0; i < raw2; i++)
  36.     {
  37.         for (int j = 0; j < col2; j++)
  38.         {
  39.            cin>> arr2[i][j];
  40.         }
  41.     }
  42.     for (int i = 0; i < raw1; i++)
  43.     {
  44.  
  45.         for (int j = 0; j < col2; j++)
  46.         {
  47.                arr3[i][j]=0;
  48.             for (int k = 0; k < col1; k++)
  49.                 arr3[i][j] += arr1[i][k] * arr2[k][j];
  50.  
  51.         }
  52.  
  53.     }
  54.     for (int i = 0; i < raw1; i++)
  55.     {
  56.         for (int j = 0; j < col2; j++)
  57.         {
  58.             cout << arr3[i][j] << " ";
  59.         }
  60.         cout << "\n";
  61.     }
  62.  
  63.     return 0;
  64. }
  65.  
Success #stdin #stdout 0s 4432KB
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https://ideone.com/cLFgmZ
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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