华为OJ--矩阵相乘

#include<iostream>
#include<vector>

using namespace std;

int main()
{
	int x, y, z;
	cin >> x >> y >> z;
	int **m2 = new int*[y];
	int **m1 = new int*[x];
	int **m3 = new int*[x];
	for (int i = 0; i < x; i++)
	{
		m1[i] = new int[y];
	}
	for (int i = 0; i < y; i++)
	{
		m2[i] = new int[z];
	}
	for (int i = 0; i < x; i++)
	{
		m3[i] = new int[z];
	}
	//vector<int>m3;

	for (int i = 0; i < x; i++)
	{
		for (int j = 0; j < y; j++)
		{
			cin >> m1[i][j];
		}
	}
	for (int i = 0; i < y; i++)
	{
		for (int j = 0; j < z; j++)
		{
			cin >> m2[i][j];
		}
	}
	for (int i = 0; i < x; i++)
	{
		for (int j = 0; j < z; j++)
		{
			m3[i][j] = 0;
		}
	}
	for (int i = 0; i < x; i++)
	{
		for (int j = 0; j < z; j++)
		{
			for (int k = 0; k < y; k++)
			{
				m3[i][j] += m1[i][k] * m2[k][j];
			}
		}
	}

	for (int i = 0; i<x; i++)
	{
		for (int j = 0; j<z - 1; j++)
			cout << m3[i][j] << " ";
		cout << m3[i][z - 1] << endl;
	}
	cout << endl;
	for (int i = 0; i < x; i++)
	{
		delete m1[i];
	}
	for (int i = 0; i < y; i++)
	{
		delete m2[i];
	}
	for (int i = 0; i < x; i++)
	{
		delete m3[i];
	}
	return 0;
}

不知道为什么只得到60分。