結果
問題 | No.1479 Matrix Eraser |
ユーザー | aaaaaaaaaa2230 |
提出日時 | 2021-04-16 22:16:26 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,099 bytes |
コンパイル時間 | 155 ms |
コンパイル使用メモリ | 81,792 KB |
実行使用メモリ | 266,496 KB |
最終ジャッジ日時 | 2024-07-03 02:10:32 |
合計ジャッジ時間 | 11,838 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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 | 60 ms
81,280 KB |
testcase_01 | AC | 69 ms
77,056 KB |
testcase_02 | AC | 63 ms
76,288 KB |
testcase_03 | AC | 62 ms
76,672 KB |
testcase_04 | AC | 62 ms
76,800 KB |
testcase_05 | AC | 62 ms
76,824 KB |
testcase_06 | AC | 63 ms
76,800 KB |
testcase_07 | AC | 2,288 ms
147,452 KB |
testcase_08 | TLE | - |
testcase_09 | TLE | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
testcase_27 | -- | - |
testcase_28 | -- | - |
testcase_29 | -- | - |
testcase_30 | -- | - |
testcase_31 | -- | - |
testcase_32 | -- | - |
testcase_33 | -- | - |
testcase_34 | -- | - |
testcase_35 | -- | - |
testcase_36 | -- | - |
testcase_37 | -- | - |
testcase_38 | -- | - |
testcase_39 | -- | - |
testcase_40 | -- | - |
ソースコード
from collections import deque import sys sys.setrecursionlimit(10**6) class MaxFlow: inf = 10**18 class E: def __init__(self,to,cap): self.to = to self.cap = cap self.rev = None def __init__(self,n): self.n = n self.graph = [[] for _ in range(n)] def add_edge(self, fr, to, cap): graph = self.graph edge = self.E(to,cap) edge2 = self.E(fr,0) edge.rev = edge2 edge2.rev = edge graph[fr].append(edge) graph[to].append(edge2) def bfs(self, s, t): level = self.level = [self.n]*self.n q = deque([s]) level[s] = 0 while q: now = q.popleft() lw = level[now]+1 for e in self.graph[now]: if e.cap and level[e.to]> lw: level[e.to] = lw if e.to == t: return True q.append(e.to) return False def dfs(self, s, t, up): graph = self.graph it = self.it level = self.level st = deque([t]) while st: v = st[-1] if v == s: st.pop() flow = up for w in st: e = graph[w][it[w]].rev flow = min(flow, e.cap) for w in st: e = graph[w][it[w]] e.cap += flow e.rev.cap -= flow return flow lv = level[v]-1 while it[v] < len(graph[v]): e = graph[v][it[v]] re = e.rev if re.cap == 0 or lv != level[e.to]: it[v] += 1 continue st.append(e.to) break if it[v] == len(graph[v]): st.pop() level[v] = self.n return 0 def flow(self,s,t,flow_limit=inf): flow = 0 while flow < flow_limit and self.bfs(s,t): self.it = [0]*self.n while flow < flow_limit: f = self.dfs(s,t,flow_limit-flow) if f == 0: break flow += f return flow def min_cut(self,s): visited = [0]*self.n q = deque([s]) while q: v = q.pop() visited[v] = 1 for e in self.graph[v]: if e.cap and not visited[e.to]: q.append(e.to) return visited h,w = map(int,input().split()) A = [list(map(int,input().split())) for i in range(h)] xy = [[] for i in range(5*10**5+5)] for i in range(h): for j in range(w): xy[A[i][j]].append((i,j)) ans = 0 for i in range(5*10**5,0,-1): if xy[i] == []: continue s = h+w t = s+1 maxflow = MaxFlow(t+1) for j in range(h): maxflow.add_edge(s, j, 1) for j in range(w): maxflow.add_edge(h+j, t, 1) for x,y in xy[i]: maxflow.add_edge(x, h+y, 1) ans += maxflow.flow(s, t) print(ans)