#include "stdafx.h"

int main(int argc, char* argv[])
{
	int a[3][3]={{1,2,3},{4,5,6},{7,8,9}};

	//1 2 3
	//4 5 6
	//7 8 9
	int sum=0;
	for(int i=0; i<3; i++)
		sum+=a[i][i];

	printf("%d\n", sum);

	return 0;
}