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  1. #include <stdio.h>
  2.  
  3. int sumodd(int n){
  4.     if(n%2==1){
  5.         if(n/2==0){
  6.             return n;
  7.         }
  8.         else{
  9.             return n+sumodd(n-2);
  10.         }
  11.     }
  12.     else{
  13.         n--;
  14.         if(n%2==0){
  15.             if(n/2==0){
  16.                 return n;
  17.             }
  18.             else{
  19.                 return n+sumodd(n-2);
  20.             }
  21.         }
  22.     }
  23. }
  24.  
  25. int main(){
  26.     int a;
  27.     scanf("%d",&a);
  28.     printf("%d",sumodd(a));
  29.  
  30.     return 0;
  31. }
  32.  
  33.  
Success #stdin #stdout 0s 5284KB
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https://ideone.com/2y2q1M
language:
C (gcc 8.3)
created:
53 days ago
visibility:
public

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