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  1. #include <stdio.h>
  2.  
  3. int main()
  4. {
  5.     int N;
  6.     scanf("%d", &N);
  7.  
  8.     int minB = 5000;
  9.     for (int i=0; i<=(N/3); i++)
  10.     {
  11.         int kg = i*3;
  12.         int kgRe = N - (kg);
  13.         if (kgRe%5==0)
  14.         {
  15.             int B = i+kgRe/5;
  16.             if (B<minB)
  17.             {
  18.                 minB = B;
  19.             }
  20.         }
  21.     }
  22.     if (minB==5000)
  23.         printf("-1");
  24.     else
  25.         printf("%d", minB);
  26.     return 0;
  27. }
Success #stdin #stdout 0s 4396KB
comments (?)
stdin 
18
stdout 
4
https://ideone.com/Cpxb9T
v- P151SUMB - ROUND 1B - Đong gạo
language:
C (gcc 8.3)
created:
7 years ago
visibility:
secret

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