MatrixMultiple.cc

#include <iostream>
#include <cmath>
#include <sstream>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <numeric>

int main()
{
  int n,m;
  std::cin >> n >> m;

  int **matrix = new int*[n];
  for (int i=0;i<n;i++) {
    matrix[i] = new int[m];
  }

  for (int i=0; i<n; i++) {
    for (int j=0; j<m; j++) {
        int num;
        std::cin >> num;
        matrix[i][j] = num;
    }
  }


  int *vec = new int[m];
  for (int i=0;i<m;i++) {
    std::cin >> vec[i];
  }


  int *result = new int[n];

  for (int i=0;i<n;i++) {
    int c = 0;
    for (int j=0;j<m;j++) {
      c = c + vec[j] * matrix[i][j];
    }
    result[i] = c;
  }


  for (int i=0; i<n;i++) {
    std::cout << result[i] << std::endl;
  }

  return 0;
}