結果
| 問題 |
No.654 Air E869120
|
| コンテスト | |
| 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)