#include <cstdio>

#define W 4
#define H 4

int main() {
	int matrix[W][H];
	
	for (int x = 0; x < W; ++x) {
		for (int y = 0; y < H; ++y) {
			matrix[x][y] = x | y << 16;
		}
	}
	
	// Выбираем диагональ
	long avg = 0;
	int avg_n = 0;
	
	int curr_w = W;
	for (int y = 0; y < H; ++y) {
		for (int x = 0; x < curr_w; ++x) {
			printf("[%d, %d]", matrix[x][y] & 0xFFFF, matrix[x][y] >> 16 & 0xFFFF);
			avg += matrix[x][y];
			++avg_n;
		}
		printf("\n");
		--curr_w;
	}
	
	avg = avg / avg_n;
	
	printf("avg = %ld\n", avg);
	
	return 0;
}