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

int ** createMatrix(unsigned int n)
{
    int **A = malloc(n * sizeof(int*));
    for(unsigned int i = 0; i < n; i++)
    {
        A[i] = malloc(n * sizeof(int));
    }
    return A;
}

void killMatrix(int**A, unsigned int n)
{
    for(unsigned int i = 0; i < n; i++)
    {
        free(A[i]);
    }
    free(A);
}

int** mult(int**A, int**B, unsigned int n)
{
    int ** R = createMatrix(n);
    for(unsigned int i = 0; i < n; i++)
        for(unsigned int j = 0; j < n; j++)
        {
            R[i][j] = 0;
            for(unsigned int k = 0; k < n; k++)
                R[i][j] += A[i][k] * B[k][j];
        }
    return R;
}

int** sum(int**A, int**B, unsigned int n)
{
    int ** R = createMatrix(n);
    for(unsigned int i = 0; i < n; i++)
        for(unsigned int j = 0; j < n; j++)
            R[i][j] = A[i][j]+B[i][j];
    return R;
}

void printMatrix(int** A, unsigned int n)
{
    for(unsigned int i = 0; i < n; i++) // вывод матрицы А
    {
        for(unsigned int j = 0; j < n; j++)
            printf("%d\t", A[i][j]);
        printf("\n");
    }
}

int main(void)
{
    unsigned int n;
    srand(time(NULL));
    printf("Введите размер матрицы n: ");
    scanf("%u", &n);

    int **A = createMatrix(n);
    int **B = createMatrix(n);
    int **C = createMatrix(n);

    for(unsigned int i = 0; i < n; i++)
        for(unsigned int j = 0; j < n; j++)
        {
            A[i][j] = rand() % 10;
            B[i][j] = rand() % 10;
            C[i][j] = rand() % 10;
        }


    printf("\nМатрица А:\n");
    printMatrix(A,n);

    printf("\nМатрица В:\n");
    printMatrix(B,n);

    printf("\nМатрица С:\n");
    printMatrix(C,n);

    int ** F = mult(C,A,n);
    int ** G = mult(A,C,n);
    int ** H = mult(G,B,n);
    killMatrix(G,n);
    G = sum(F,H,n);
    killMatrix(F,n);
    killMatrix(H,n);

    printf("\nМатрица-результат:\n");
    printMatrix(G,n);
    killMatrix(G,n);


}