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ABC406Dを解いた【set】

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筆者はレート800前後の茶~緑コーダ

ABC当日にACできなかった問題を解いていく

ABCの問題を解いていく

実装コード

行ごとと列ごとにsetを作って管理すればいいみたい。
除去した後はsetも綺麗にしましょう(1敗)

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():
    H, W, N = rLI()
    A = defaultdict(set)
    B = defaultdict(set)
    C = [1] * N

    for k in range(N):
        i, j = rLI()
        A[i].add(k)
        B[j].add(k)
        
    Q = rI()
    for _ in range(Q):
        q, r = rLI()
        ans = 0
        if q == 1:
            for a in A[r]:
                if C[a] > 0:
                    C[a] = 0
                    ans += 1
            A[r].clear()
        if q == 2:
            for b in B[r]:
                if C[b] > 0:
                    C[b] = 0
                    ans += 1
            B[r].clear()
        print(ans)
            
    
if __name__ == '__main__':
    main()

感想

問題文の縦座標がx、横座標がyで表現しているのとてもいとをかしと思います。

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