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yukicoder contest 311 参戦記

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yukicoder contest 311 参戦記

1時間遅れの参加でAしか解けませんでした.

A 1656 Recuperation

B 日でストレスが A×B になって、それを癒やすのに A×B 日かかるので、合計日数は B + A×B = (A+1)B 日ですね.

from sys import stdin

readline = stdin.readline

T = int(readline())

result = []
for _ in range(T):
    A, B = map(int, readline().split())
    result.append((A + 1) * B)
print(*result, sep='\n')

C 1658 Product / Sum

直感的に A1=x, A2=y, A3=1, A4=1, ..., AN=1 なんだろうなと思い、xy/(x + y + N - 2) = K という式を書きましたが、ここから式変形する才能がありませんでした orz.

N, K = map(int, input().split())

result = [1] * N
result[0] = 2 * K
result[1] = 2 * K + N - 2
print(*result)
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