結果

問題 No.274 The Wall
ユーザー prin_kemkemprin_kemkem
提出日時 2023-05-11 21:47:06
言語 PyPy3
(7.3.15)
結果
TLE  
実行時間 -
コード長 3,247 bytes
コンパイル時間 570 ms
コンパイル使用メモリ 86,784 KB
実行使用メモリ 808,328 KB
最終ジャッジ日時 2023-08-18 12:45:24
合計ジャッジ時間 12,656 ms
ジャッジサーバーID
(参考情報)
judge15 / judge12
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 143 ms
78,400 KB
testcase_01 AC 145 ms
78,540 KB
testcase_02 AC 143 ms
78,388 KB
testcase_03 AC 985 ms
393,448 KB
testcase_04 AC 141 ms
78,336 KB
testcase_05 AC 142 ms
78,472 KB
testcase_06 AC 143 ms
78,392 KB
testcase_07 AC 140 ms
78,192 KB
testcase_08 AC 140 ms
78,472 KB
testcase_09 AC 141 ms
78,340 KB
testcase_10 AC 141 ms
78,388 KB
testcase_11 TLE -
testcase_12 AC 190 ms
82,052 KB
testcase_13 AC 165 ms
81,136 KB
testcase_14 AC 200 ms
82,740 KB
testcase_15 AC 220 ms
82,692 KB
testcase_16 AC 1,247 ms
414,836 KB
testcase_17 AC 1,212 ms
370,936 KB
testcase_18 AC 1,285 ms
415,456 KB
testcase_19 AC 253 ms
83,684 KB
testcase_20 AC 264 ms
83,384 KB
testcase_21 AC 252 ms
83,460 KB
testcase_22 AC 265 ms
83,740 KB
testcase_23 AC 260 ms
83,372 KB
testcase_24 AC 270 ms
83,352 KB
testcase_25 AC 266 ms
84,140 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 #

from collections import defaultdict, deque, Counter
import copy
from itertools import combinations, permutations, product, accumulate, groupby
from heapq import heapify, heappop, heappush
import math
import bisect
from pprint import pprint
import sys
# sys.setrecursionlimit(700000)
input = lambda: sys.stdin.readline().rstrip('\n')
inf = float('inf')
mod1 = 10**9+7
mod2 = 998244353
def ceil_div(x, y): return -(-x//y)

#################################################

def sccd(adj, radj):
    n = len(adj)
    been = [False]*n
    P = []
    for s in range(n):
        if been[s]: continue
        stack = [s]
        while stack:
            now = stack.pop()
            if now >= 0:
                if been[now]: continue
                been[now] = True
                stack.append(~now)
                for nxt in adj[now]:
                    if been[nxt]: continue
                    stack.append(nxt)
            else:
                P.append(~now)
    scc_idx = [None]*n
    idx = 0
    for s in reversed(P):
        if not been[s]: continue
        been[s] = False
        stack = [s]
        while stack:
            now = stack.pop()
            scc_idx[now] = idx
            for nxt in radj[now]:
                if not been[nxt]: continue
                been[nxt] = False
                stack.append(nxt)
        idx += 1
    return scc_idx

class Two_SAT:
    def __init__(self, n) -> None:
        self.n = n
        self.adj = [[] for _ in range(2*n)]
        self.radj = [[] for _ in range(2*n)]
    def add(self, x, y): # 否定したいときは~xを入れる
        if x >= 0 and y >= 0:
            self.adj[self.n+x].append(y)
            self.radj[y].append(self.n+x)
            self.adj[self.n+y].append(x)
            self.radj[x].append(self.n+y)
        elif x >= 0:
            y = ~y
            self.adj[self.n+x].append(self.n+y)
            self.radj[self.n+y].append(self.n+x)
            self.adj[y].append(x)
            self.radj[x].append(y)
        elif y >= 0:
            x = ~x
            self.adj[x].append(y)
            self.radj[y].append(x)
            self.adj[self.n+y].append(self.n+x)
            self.radj[self.n+x].append(self.n+y)
        else:
            x = ~x; y = ~y
            self.adj[x].append(self.n+y)
            self.radj[self.n+y].append(x)
            self.adj[y].append(self.n+x)
            self.radj[self.n+x].append(y)
    def solve(self):
        scc_idx = sccd(self.adj, self.radj)
        for x in range(self.n):
            i, j = scc_idx[x], scc_idx[self.n+x]
            if i == j:
                return None
        return 0

def is_intersect(li, ri, lj, rj):
    if li > lj: li, ri, lj, rj = ri, rj, li, lj
    return lj <= ri

N, M = map(int, input().split())
blocks = [tuple(map(int, input().split())) for _ in range(N)]
sat = Two_SAT(N)
for i in range(N):
    li, ri = blocks[i]
    for j in range(i+1, N):
        lj, rj = blocks[j]
        if is_intersect(li, ri, lj, rj): sat.add(~i, ~j)
        if is_intersect(li, ri, M-1-rj, M-1-lj): sat.add(~i, j)
        if is_intersect(M-1-ri, M-1-li, lj, rj): sat.add(i, ~j)
        if is_intersect(M-1-ri, M-1-li, M-1-rj, M-1-lj): sat.add(i, j)
del blocks
ans = sat.solve()
print("YNEOS"[ans is None::2])
0