vector< vector<int> > makeMatrix(vector<EndP> end,int endNum , int num_caches, int num_videos)
{
	//make matrix

	vector< vector<int> > matrix;
	matrix.resize(num_videos);
	for(int i=0;i<num_videos;i++)
	{
		matrix[i].resize(num_caches);
	}

	//clean matrix
	for(int i=0;i<num_videos;i++)
	{
		for(int j=0;j<num_caches;j++)
		{
			matrix[i][j]=0;
		}
	}

	//fill matrix
	for(int i=0;i<endNum;i++)
	{
		for(auto& video: end[i].requests)
		{
			for(auto& cache: end[i].cLatency)
			{
				matrix[video.first][cache.first]+=(end[i].dLatency-cache.second)*(video.second);
			}
		}
	}

	return matrix;


}