S002-AC.cc
287 Bytes
#include <iostream>
using namespace std;
int gcd(int a, int b)
{
if(!a)
{
return b;
}
if(!b)
{
return a;
}
int res;
while(b)
{
res = b;
b = a % b;
a = res;
}
return res;
}
int main()
{
/* int a,b;
cin >> a;
cin >> b;
cout << gcd(a,b) << endl;
return 0;
*/
}