#670957 (PyPy3) No.654 Air E869120

• 問題: No.654 Air E869120
• ユーザー: tcltk
• 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

ファイルパターン	結果
sample	AC * 5
other	AC * 35

ソースコード

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#!/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)
 
 
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