#include <stdio.h>
#include <stdlib.h>
#include <time.h>


#define SIZE 1024

void matmul(float** A, float** B, float** C, int n) {
	int i,j,k;
    for (i = 0; i < n; i++) {
        for (j = 0; j < n; j++) {
            C[i][j] = 0;
            for (k = 0; k < n; k++) {
                C[i][j] += A[i][k] * B[k][j];
            }
        }
    }
}

int main() {
    srand(time(NULL));
    float** A = (float**)malloc(SIZE * sizeof(float*));
    float** B = (float**)malloc(SIZE * sizeof(float*));
    float** C = (float**)malloc(SIZE * sizeof(float*));
int i;
    for (i = 0; i < SIZE; i++) {
        A[i] = (float*)malloc(SIZE * sizeof(float));
        B[i] = (float*)malloc(SIZE * sizeof(float));
        C[i] = (float*)malloc(SIZE * sizeof(float));
    }
int j;
    for (i = 0; i < SIZE; i++) {
        for (j = 0; j < SIZE; j++) {
            A[i][j] = rand() % 100;
            B[i][j] = rand() % 100;
        }
    }

    clock_t start = clock();
    matmul(A, B, C, SIZE);
    clock_t end = clock();

    double time_taken = (double)(end - start) / CLOCKS_PER_SEC;
    printf(" %f s\n", time_taken);

    for (i = 0; i < SIZE; i++) {
        free(A[i]);
        free(B[i]);
        free(C[i]);
    }
    free(A);
    free(B);
    free(C);

    return 0;
}