結果
問題 |
No.654 Air E869120
|
ユーザー |
|
提出日時 | 2021-06-28 02:01:13 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 278 ms / 2,000 ms |
コード長 | 2,514 bytes |
コンパイル時間 | 322 ms |
コンパイル使用メモリ | 82,432 KB |
実行使用メモリ | 97,664 KB |
最終ジャッジ日時 | 2024-06-25 11:57:30 |
合計ジャッジ時間 | 9,849 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 5 |
other | AC * 35 |
ソースコード
#!/usr/bin/env python3 # from typing import * import sys import io import math import collections import decimal import itertools import bisect import heapq def input(): return sys.stdin.readline()[:-1] # sys.setrecursionlimit(1000000) # _INPUT = """# paste here... # """ # sys.stdin = io.StringIO(_INPUT) class Dinic: def __init__(self, n): self.n = n self.links = [[] for _ in range(n)] self.depth = None self.progress = None def add_link(self, _from, to, cap): self.links[_from].append([cap, to, len(self.links[to])]) self.links[to].append([0, _from, len(self.links[_from]) - 1]) def bfs(self, s): depth = [-1] * self.n depth[s] = 0 q = collections.deque([s]) while q: v = q.popleft() for cap, to, rev in self.links[v]: if cap > 0 and depth[to] < 0: depth[to] = depth[v] + 1 q.append(to) self.depth = depth def dfs(self, v, t, flow): if v == t: return flow links_v = self.links[v] for i in range(self.progress[v], len(links_v)): self.progress[v] = i cap, to, rev = link = links_v[i] if cap == 0 or self.depth[v] >= self.depth[to]: continue d = self.dfs(to, t, min(flow, cap)) if d == 0: continue link[0] -= d self.links[to][rev][0] += d return d return 0 def max_flow(self, s, t): flow = 0 while True: self.bfs(s) if self.depth[t] < 0: return flow self.progress = [0] * self.n current_flow = self.dfs(s, t, INF) while current_flow > 0: flow += current_flow current_flow = self.dfs(s, t, INF) INF = 10**15 N, M, D = map(int, input().split()) mf = Dinic(2*M+2) Freight = [] for i in range(M): u, v, p, q, w = map(int, input().split()) Freight.append((u-1, v-1, p, q, w)) mf.add_link(2*i+1, 2*i+2, w) if u == 1: mf.add_link(0, 2*i+1, INF) if v == N: mf.add_link(2*i+2, 2*M+1, INF) for i1 in range(M): for i2 in range(M): if i1 == i2: continue u1, v1, p1, q1, w1 = Freight[i1] u2, v2, p2, q2, w2 = Freight[i2] if v1 == u2 and q1+D <= p2: mf.add_link(2*i1+2, 2*i2+1, INF) flow = mf.max_flow(0, 2*M+1) print(flow)