some-cpp-files/Miscellaneous/gcd.cpp

#include <bits/stdc++.h>

using namespace std;

int main(void) {
	int a, b;
	int t;
	scanf("%d %d", &a, &b);

	while (b != 0) {
		t = a % b;
		a = b;
		b = t;
	}
	printf("%d\n", a);

	return 0;
}