結果
| 問題 |
No.957 植林
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-03-02 06:13:51 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,398 bytes |
| コンパイル時間 | 170 ms |
| コンパイル使用メモリ | 82,176 KB |
| 実行使用メモリ | 182,732 KB |
| 最終ジャッジ日時 | 2024-10-03 01:33:05 |
| 合計ジャッジ時間 | 14,853 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 9 WA * 2 RE * 4 TLE * 1 -- * 29 |
ソースコード
import sys
readline = sys.stdin.readline
INF = float('inf')
class Dinic:
def __init__(self, n):
self.n = n
self.links = [[] for _ in range(n)]
self.depth = None
self.progress = None
def add_edge(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):
from collections import deque
depth = [-1] * self.n
depth[s] = 0
q = 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, float('inf'))
while current_flow > 0:
flow += current_flow
current_flow = self.dfs(s, t, float('inf'))
def main():
H, W = map(int, readline().split())
G = tuple(tuple(map(int, readline().split())) for _ in range(H))
R = tuple(map(int, readline().split()))
C = tuple(map(int, readline().split()))
V = H * W + H + W + 2
dinic = Dinic(V)
s, t = V - 2, V - 1
add = dinic.add_edge
for h in range(H):
for w in range(W):
v = W * h + w
add(s, v, G[h][w])
add(v, h + H * W, INF)
add(v, w + H * W + W, INF)
for h in range(H):
add(h + H * W, t, R[h])
for w in range(W):
add(w + H * W + W, t, C[w])
flow = dinic.max_flow(s, t)
print(sum(R) + sum(C) - flow)
if __name__ == "__main__":
main()