結果
問題 | No.1301 Strange Graph Shortest Path |
ユーザー | roaris |
提出日時 | 2020-11-28 02:37:42 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 2,065 bytes |
コンパイル時間 | 412 ms |
コンパイル使用メモリ | 87,112 KB |
実行使用メモリ | 258,188 KB |
最終ジャッジ日時 | 2023-10-09 23:22:53 |
合計ジャッジ時間 | 37,530 ms |
ジャッジサーバーID (参考情報) |
judge12 / judge14 |
(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 | 82 ms
258,188 KB |
testcase_01 | AC | 80 ms
71,556 KB |
testcase_02 | AC | 952 ms
178,912 KB |
testcase_03 | AC | 882 ms
166,820 KB |
testcase_04 | AC | 1,043 ms
183,756 KB |
testcase_05 | AC | 888 ms
179,948 KB |
testcase_06 | AC | 1,048 ms
176,200 KB |
testcase_07 | AC | 985 ms
176,256 KB |
testcase_08 | AC | 856 ms
168,072 KB |
testcase_09 | AC | 972 ms
171,000 KB |
testcase_10 | AC | 900 ms
167,512 KB |
testcase_11 | AC | 1,097 ms
178,728 KB |
testcase_12 | AC | 1,031 ms
178,472 KB |
testcase_13 | AC | 1,041 ms
180,840 KB |
testcase_14 | AC | 926 ms
170,024 KB |
testcase_15 | AC | 937 ms
171,592 KB |
testcase_16 | AC | 1,057 ms
184,012 KB |
testcase_17 | AC | 1,015 ms
182,988 KB |
testcase_18 | AC | 1,030 ms
172,452 KB |
testcase_19 | AC | 1,006 ms
176,252 KB |
testcase_20 | AC | 966 ms
175,236 KB |
testcase_21 | AC | 974 ms
179,764 KB |
testcase_22 | AC | 1,019 ms
177,192 KB |
testcase_23 | AC | 980 ms
180,400 KB |
testcase_24 | AC | 980 ms
175,900 KB |
testcase_25 | AC | 1,054 ms
183,320 KB |
testcase_26 | AC | 925 ms
176,280 KB |
testcase_27 | AC | 969 ms
177,772 KB |
testcase_28 | AC | 925 ms
176,284 KB |
testcase_29 | AC | 1,036 ms
183,652 KB |
testcase_30 | AC | 1,150 ms
183,600 KB |
testcase_31 | AC | 1,025 ms
182,272 KB |
testcase_32 | AC | 78 ms
71,392 KB |
testcase_33 | AC | 478 ms
172,948 KB |
testcase_34 | TLE | - |
ソースコード
import sys input = sys.stdin.readline from heapq import * class Mincostflow: def __init__(self, N): self.N = N self.G = [[] for _ in range(N)] def add_edge(self, u, v, cap, cost): self.G[u].append([v, cap, cost, len(self.G[v])]) self.G[v].append([u, 0, -cost, len(self.G[u])-1]) def min_cost_flow(self, s, t, f): res = 0 while f>0: h = [0]*self.N dist = [1<<60]*self.N dist[s] = 0 pq = [(0, s)] prev_v = [-1]*self.N prev_e = [-1]*self.N while pq: d, v = heappop(pq) if dist[v]<d: continue for i in range(len(self.G[v])): nv, cap, cost, _ = self.G[v][i] if cap>0 and dist[nv]>dist[v]+cost+h[v]-h[nv]: dist[nv] = dist[v]+cost+h[v]-h[nv] prev_v[nv] = v prev_e[nv] = i heappush(pq, (dist[nv], nv)) if dist[t]==10**18: return -1 for i in range(N): h[i] += dist[i] d = f v = t while v!=s: d = min(d, self.G[prev_v[v]][prev_e[v]][1]) v = prev_v[v] f -= d res += d*h[t] v = t while v!=s: self.G[prev_v[v]][prev_e[v]][1] -= d rev = self.G[prev_v[v]][prev_e[v]][3] self.G[v][rev][1] += d v = prev_v[v] return res N, M = map(int, input().split()) mcf = Mincostflow(N) for _ in range(M): u, v, c, d = map(int, input().split()) mcf.add_edge(u-1, v-1, 1, c) mcf.add_edge(v-1, u-1, 1, c) mcf.add_edge(u-1, v-1, 1, d) mcf.add_edge(v-1, u-1, 1, d) print(mcf.min_cost_flow(0, N-1, 2))