Problem : 20


#include <stdio.h>

int SUM ()
{
    int sum = 0, i, j;

	for(i = 1; i < 1000; i++) {
		for(j = 1; j < 1000; j++) {
			for(int k = 1; k < 1000; k++) {
				sum++;
				sum %= 1000;
			}
		}
	}
	printf("%d\n",sum);
	return sum;

}
int main() {
	SUM();
	return 0;

}


// What's the output ?
// Source : http://www.youngprogrammer.com/
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