Submission #86

#include <bits/stdc++.h>
using namespace std;

int main() {
    long long _a,_b;
    __int128 a, b;
    cin >> _a >> _b;
  a = _a, b = _b;
    auto c = a * b;
    string s = "";
  while(c) s += c % 10 + '0', c /= 10;
  ranges::reverse(s);
  cout << s;
    return 0;
}