#include <stdio.h>
#include <conio.h>

int calcGCD (int value1, int value2) {
	if (value2 == 0) { 
		return value1;
	}
	else {
		return calcGCD(value2, (value1%value2));
	}
}
int main() {
	printf("%d\n", calcGCD(700,350));
	return 0;
}