cmmdc

#include <iostream>

using namespace std;

int main() {
  int a = 0, b = 0, r = 0;
  cout << "a=";
  cin >> a;
  cout << "b=";
  cin >> b;
  while (b) {
    r = a % b;
    a = b;
    b = r;
  }
  cout << "cmmdc= " << a;

  return 0;
}