結果

問題 No.274 The Wall
ユーザー iehn_iehn_
提出日時 2020-08-14 10:37:08
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 310 ms / 2,000 ms
コード長 2,370 bytes
コンパイル時間 191 ms
コンパイル使用メモリ 82,572 KB
実行使用メモリ 93,164 KB
最終ジャッジ日時 2024-06-22 02:39:13
合計ジャッジ時間 6,764 ms
ジャッジサーバーID
(参考情報)
judge1 / judge5
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 149 ms
90,236 KB
testcase_01 AC 148 ms
89,888 KB
testcase_02 AC 149 ms
89,796 KB
testcase_03 AC 159 ms
90,488 KB
testcase_04 AC 147 ms
90,216 KB
testcase_05 AC 146 ms
89,948 KB
testcase_06 AC 149 ms
90,004 KB
testcase_07 AC 147 ms
90,088 KB
testcase_08 AC 147 ms
89,796 KB
testcase_09 AC 151 ms
90,028 KB
testcase_10 AC 146 ms
89,956 KB
testcase_11 AC 164 ms
90,376 KB
testcase_12 AC 207 ms
90,704 KB
testcase_13 AC 181 ms
90,096 KB
testcase_14 AC 212 ms
91,208 KB
testcase_15 AC 251 ms
92,088 KB
testcase_16 AC 167 ms
90,728 KB
testcase_17 AC 168 ms
90,856 KB
testcase_18 AC 162 ms
90,924 KB
testcase_19 AC 291 ms
92,760 KB
testcase_20 AC 300 ms
93,164 KB
testcase_21 AC 310 ms
92,764 KB
testcase_22 AC 302 ms
92,820 KB
testcase_23 AC 291 ms
92,548 KB
testcase_24 AC 300 ms
92,548 KB
testcase_25 AC 308 ms
92,988 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,copy,functools
import time,random

sys.setrecursionlimit(10**7)
inf = 10**20
eps = 1.0 / 10**10
mod = 10**9+7
mod2 = 998244353
dd = [(-1,0),(0,1),(1,0),(0,-1)]
ddn = [(-1,0),(-1,1),(0,1),(1,1),(1,0),(1,-1),(0,-1),(-1,-1)]

def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(): return [list(map(int, l.split())) for l in sys.stdin.readlines()]
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def S(): return input()
def pf(s): return print(s, flush=True)
def pe(s): return print(str(s), file=sys.stderr)
def JA(a, sep): return sep.join(map(str, a))
def JAA(a, s, t): return s.join(t.join(map(str, b)) for b in a)

def scc(n, e, re):
    v = [None] * n
    t = []
    def dfs(i):
        v[i] = 0
        for b in e[i]:
            if v[b] is None:
                dfs(b)
        t.append(i)

    for i in range(n):
        if v[i] is None:
            dfs(i)

    r = [None] * n
    def dfs2(i, p):
        r[i] = p
        for b in re[i]:
            if r[b] is None:
                dfs2(b, p)

    for c in t[::-1]:
        if r[c] is None:
            dfs2(c, c)

    return r

def main():
    n,m = LI()
    lr = [LI() for _ in range(n)]

    e = [[] for _ in range(n*2)]
    re = [[] for _ in range(n*2)]
    def f(i,ni,li,ri,j,nj,lj,rj):
        if li<=lj<=ri or li<=rj<=ri or lj<=li<=rj:
            e[i].append(nj)
            re[nj].append(i)
            e[j].append(ni)
            re[ni].append(j)
            return 1
        return 0

    for i in range(n):
        li,ri = lr[i]
        rli,rri = m-ri-1,m-li-1
        for j in range(i+1,n):
            lj,rj = lr[j]
            rlj,rrj = m-rj-1,m-lj-1
            ac = 0
            ac += f(i,i+n,li,ri,j,j+n,lj,rj)
            ac += f(i,i+n,li,ri,j+n,j,rlj,rrj)
            ac += f(i+n,i,rli,rri,j,j+n,lj,rj)
            ac += f(i+n,i,rli,rri,j+n,j,rlj,rrj)
            if ac > 3:
                return "NO"

    r = scc(n*2,e,re)
    for i in range(n):
        if r[i] == r[i+n]:
            return "NO"

    return "YES"

# start = time.time()
print(main())
# pe(time.time() - start)



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