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前回の振り返り

今日はABC406開催日だったので参加結果を振り返る

今週はA,Bの2完(1ペナ)

A

2つめの条件にA==Cをつけ忘れて1ペナ

ソースコード

main.py
from bisect import bisect_left, bisect_right, insort_left, insort_right
from collections import defaultdict, Counter, deque
from functools import reduce, lru_cache
from itertools import product, accumulate, groupby, combinations
import sys
import os
def rI(): return int(sys.stdin.readline().rstrip())
def rLI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def rI1(): return (int(sys.stdin.readline().rstrip())-1)
def rLI1(): return list(map(lambda a:int(a)-1,sys.stdin.readline().rstrip().split()))
def rS(): return sys.stdin.readline().rstrip()
def rLS(): return list(sys.stdin.readline().rstrip().split())
IS_LOCAL = int(os.getenv("ATCODER", "0"))==0
err = (lambda *args, **kwargs: print(*args, **kwargs, file=sys.stderr)) if IS_LOCAL else (lambda *args, **kwargs: None)

def main():
    A, B, C, D = rLI()

    ans = A > C or ((A == C)and(B > D))

    print('Yes' if ans else 'No')
    
if __name__ == '__main__':
    main()

B

10**K 以上かどうかで判断できるpythonの多倍長整数に感謝

ソースコード

main.py
from bisect import bisect_left, bisect_right, insort_left, insort_right
from collections import defaultdict, Counter, deque
from functools import reduce, lru_cache
from itertools import product, accumulate, groupby, combinations
import sys
import os
def rI(): return int(sys.stdin.readline().rstrip())
def rLI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def rI1(): return (int(sys.stdin.readline().rstrip())-1)
def rLI1(): return list(map(lambda a:int(a)-1,sys.stdin.readline().rstrip().split()))
def rS(): return sys.stdin.readline().rstrip()
def rLS(): return list(sys.stdin.readline().rstrip().split())
IS_LOCAL = int(os.getenv("ATCODER", "0"))==0
err = (lambda *args, **kwargs: print(*args, **kwargs, file=sys.stderr)) if IS_LOCAL else (lambda *args, **kwargs: None)

def main():
    N, K = rLI()
    A = rLI()
    M = 10 ** K
    ans = A[0]
    for a in A[1:]:
        ans *= a
        if ans >= M:
            ans = 1
        err(ans)
    print(ans)
    
if __name__ == '__main__':
    main()

C

差分と2階差分をだしたけど
どうやって数えるのって感じ。

D

X座標別にまとめるのとY座標別にまとめようとして
X座標で消したあとにY座標別のまとめにどう反映するかわからんかった。

E

コンビネーションからどう短縮するの?
bitDP?

F

貴様、木様の問題をだすのか!

G

有名なNP問題のオマージュですか…

感想

CとDが閃かなくてEも無理そうだったので逃亡しました。ごめんなさい

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