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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4.  
  5. int main()
  6. {
  7.     ll tes;
  8.     cin>>tes;
  9.     while(tes--)
  10.     {
  11.         ll a,b;
  12.         cin>>a>>b;
  13.         if(a>b)swap(a,b);
  14.         ll diff=b-a;
  15.         ll ans=0;
  16.         ans+=(diff/5);
  17.         diff=diff%5;
  18.         ans+=(diff/2);
  19.         diff=diff%2;
  20.         ans+=diff;
  21.         cout<<ans<<endl;
  22.     }
  23.     return 0;
  24. }
  25.  
Success #stdin #stdout 0s 4244KB
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Standard input is empty
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28146342416636
https://ideone.com/oU1YF0
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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