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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.     long long a,b,s=0;
  8.     cin>>a>>b;
  9.     for(int i=a;i<=b;i++){
  10.         s+=i;
  11.     }
  12.     cout<<s;
  13.     return 0;
  14. }
  15.  
  16. //(n+1)*n/2;
  17.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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2 5
stdout
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14
https://ideone.com/XXqaAF
language:
C++ (gcc 8.3)
created:
14 days ago
visibility:
public

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