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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     ios::sync_with_stdio(false);
  6.     cin.tie(nullptr);
  7.     string a; long long b;
  8.     if (!(cin >> a >> b)) return 0;
  9.  
  10.     unsigned long long m = llabs(b); 
  11.     bool neg = (a[0] == '-');
  12.     string sa = neg ? a.substr(1) : a;
  13.  
  14.     unsigned long long rem = 0;
  15.     for (char c : sa) {
  16.         rem = (rem * 10 + (c - '0')) % m;
  17.     }
  18.  
  19.     unsigned long long r = neg ? (m - rem) % m : rem % m;
  20.     cout << r << "\n";
  21.     return 0;
  22. }
  23.  
Success #stdin #stdout 0.01s 5320KB
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stdin 
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stdout 
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https://ideone.com/tkWjdf
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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