Codeforces Round #282 (Div. 2) 495B. Modular Equations Solution


  

Problem  Link  :  https://codeforces.com/contest/495/problem/B

Solution in C++:

///La ilaha illellahu muhammadur rasulullah
///******Bismillahir-Rahmanir-Rahim******///
///Abul Hasnat  Tonmoy
///Department of CSE,23rd batch
///Islamic University,Bangladesh
///**********ALLAH IS ALMIGHTY************///
#include <bits/stdc++.h>

using namespace std;
#define ll long long int
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  ll n, t, i, j, a, b, df;
  cin >> a >> b;
  if (a == b)
    cout << "infinity" << endl;
  else {
    df = abs(a - b);
    ll ans = 0;
    for (i = 1; i * i <= df; i++) {
      if (df % i == 0) {
        if (i > b)
          ans++;
        if (df / i != i && (df / i) > b)
          ans++;
      }
    }
    cout << ans << endl;
  }
}

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