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  1. #include<bits/stdc++.h>
  2. using namespace std ;
  3. long long lcm( long long a , long long b ){
  4.     return a / __gcd(a , b ) * b ;
  5. }
  6. int main(){
  7.     long long a , b , k , m ;
  8.     cin >> a >> b >> k >> m ;
  9.     long long x = b / k - a / k + b / m - a / m - ( b / lcm(k , m ) - a / lcm( k , m ) ) ;
  10.     cout << x ;
  11.  
  12. }
  13.  
Success #stdin #stdout 0s 5320KB
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1
https://ideone.com/UotyQw
language:
C++14 (gcc 8.3)
created:
6 days ago
visibility:
public

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