[BOJ]2839|送糖

マイコード

N = int(input())

ex = False

for i in range (N//3 + 1):
    for j in range (N//5 + 1):
        if N == 3*i + 5*j:
            ex = True
            print(i+j)
            break
    if ex:
        break
    
if not ex:
    print(-1)

例外コード

N = int(input())

bag = 0
while N >= 0:
    # If dived into 5, div and print bag
    if N % 5 == 0:
       bag += N // 5
       print(bag)
       break
    # If not dived into 5, sub 3 and add 1 bag
    N -= 3
    bag += 1
else:
    print(-1)

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