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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. long long a,b;
  6. cin>>a>>b;
  7. long long c=b/2;
  8. long long d=b-c;
  9. long long e=(a-1)/2;
  10. long long f=a-1-e;
  11. long long h=((c-e)/2)*2+((d-f)/2)*2;
  12. cout<<h;
  13.  
  14. 	return 0;
  15. }
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin
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2 1000000
stdout
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999998
https://ideone.com/gKVUMD
language:
C++14 (gcc 8.3)
created:
15 hours ago
visibility:
public

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