#include <iostream>
#include <omp.h>
#include <ctime>
#include <fstream>
#include <time.h>
#include <cstdlib>

using namespace std;

int main()
{

omp_set_num_threads(8);
srand (time(NULL));
ofstream zapis("wynik.txt");
int x = 750;
int A[x][x];
int B[x][x];
int C[x][x];
int c = 0;
int i, j, k;

int alpha = 3;
int beta = 2;

for(int i = 0 ; i < x ; i++) {
    for(int j = 0 ; j < x ; j++) {
        A[i][j] = rand() % 100; //liczby z zakresu 0-99
        B[i][j] = rand() % 100;
        C[i][j] = rand() % 100;
    }
}

double pocz = omp_get_wtime();

#pragma omp parallel for shared(x,A,B,C) private(i,j,k,c)
for(i = 0 ; i < x ; i++) {
    for(j = 0 ; j < x ; j++) {
        c = 0;
        for(k = 0 ; k < x ; k++) {
            c = c + A[k][i]*B[j][k];
        }
        C[j][i] = alpha*c + beta*C[j][i];
    }
}

double koniec = omp_get_wtime();

cout<<"Time: "<<koniec-pocz<<endl;
zapis<<"Time: "<<koniec-pocz<<endl;

return 0;

}