#include <stdio.h>

#define N 500

main()
{
  int x[N][N], y[N][N], z[N][N];
  int i, j, k, r;

  for (i = 0; i < N; i++) {
    for (j = 0; j < N; j++) {
      y[i][j] = i+j;
      z[i][j] = i-j;
    }
  }

  for (i = 0; i < N; i++) {
    for (j = 0; j < N; j++) {
      r = 0;
      for (k = 0; k < N; k++) {
        r = r + y[i][k]*z[k][j];
      }
      x[i][j] = r;
    }
  }
}