@@ -0,0 +1,12 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main()
+{
+  ios_base::sync_with_stdio(0);
+  cin.tie(0);
+  cout.tie(0);
+  int a,b;
+  cin>>a>>b;
+  cout<<__gcd(a,b)<<"\n";
+  return 0;
+}
Sample input out are missing.