[백준]2839번: 설탕 배달

백준>2839번: 설탕 배달

import sys

n =  int(sys.stdin.readline())

m = 9999


    
for i in range(n//5+1):
    for j in range(n//3+1):
        if 5*i + 3*j == n:
            m = min(m, i+j)
        if 5*i + 3*j > n:
            break
        

if m == 9999:
    print(-1)
else:
    print(m)