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  1. #include <stdio.h>
  2.  
  3. int main() {
  4. 	long long l,r;
  5. 	scanf("%lld %lld",&l,&r);
  6. 	printf("%lld", (r-l)/2*(r+l)/2);
  7. }
  8.  
Success #stdin #stdout 0.01s 5312KB
comments (?)
stdin 
1 7
stdout 
12
https://ideone.com/VO7njk
language:
C (gcc 8.3)
created:
15 days ago
visibility:
public

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