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ABC220 C - Long Sequence を解いた

Last updated at Posted at 2021-09-26

abc220_1.png
abc220_2.png
abc220_3.png
abc220_4.png

一応、以下で通った。

LongSequence.py
from sys import exit
N = int(input())
A = list(map(int,input().split()))
X = int(input())

B = sum(A)
base = X//B
rest = X%B

if rest == 0:
    print(base*N+1)#<= ココ1
    exit()
else:
    cnt = 0
    ans = 0
    for i in range(N):
        cnt += A[i]
        if cnt > rest:#<=ココ2
            ans = i+1
            break

print(base*N+ans)

問題文には 超えるのは何項目?っと聞いている。
最初はココ1 and ココ2 を見逃していて、以下のような記述でWAだった。

LongSequence.py
from sys import exit
N = int(input())
A = list(map(int,input().split()))
X = int(input())

B = sum(A)
base = X//B
rest = X%B

if rest == 0:
    print(base*N)#<= ココ1
    exit()
else:
    cnt = 0
    ans = 0
    for i in range(N):
        cnt += A[i]
        if cnt >= rest:#<=ココ2
            ans = i+1
            break

print(base*N+ans)

シャキッと一発で通せるようになりたい。。

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