fork download
copy 
  1. #include<bits/stdc++.h>
  2. #define pii pair<int, int>
  3. #define endl '\n'
  4. #define pb push_back
  5. #define lli long long int
  6.  
  7. using namespace std;
  8. int main()
  9. {
  10.     ios_base::sync_with_stdio(false);
  11.     cin.tie(NULL);
  12.     cout.tie(NULL);
  13.     lli ans=1, i, a, b;
  14.     bool five=0, two=0;
  15.     cin >> a >> b;
  16.     for(i=a+1;i<=b;i++)
  17.     {
  18.         if(i%2==0) two=1;
  19.         if(i%5==0) five=1;
  20.         if(five && two) cout<<"0"<<endl, exit(0);
  21.     }
  22.     for(i=a+1;i<=b;i++) ans *= 1LL*(i%10);
  23.     cout<<ans%10<<endl;
  24.     return 0;
  25. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
copy 
0 0
stdout
copy 
1
https://ideone.com/QAwDEB
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!