結果
問題 | No.1479 Matrix Eraser |
ユーザー | tamato |
提出日時 | 2021-04-16 20:31:25 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,520 bytes |
コンパイル時間 | 234 ms |
コンパイル使用メモリ | 83,040 KB |
実行使用メモリ | 215,464 KB |
最終ジャッジ日時 | 2024-07-02 22:50:32 |
合計ジャッジ時間 | 9,758 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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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 | 75 ms
76,672 KB |
testcase_02 | AC | 61 ms
76,288 KB |
testcase_03 | AC | 72 ms
76,416 KB |
testcase_04 | AC | 62 ms
77,376 KB |
testcase_05 | AC | 73 ms
76,800 KB |
testcase_06 | AC | 62 ms
76,416 KB |
testcase_07 | TLE | - |
testcase_08 | TLE | - |
testcase_09 | -- | - |
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
mod = 1000000007 eps = 10**-9 def main(): import sys input = sys.stdin.readline from collections import deque class Dinic: def __init__(self, N): self.N = N self.adj = [[] for _ in range(N + 1)] self.lv = None self.progress = None self.inf = 1 << 60 def add_edge(self, fr, to, cap): # [to, cap, rev] forward = [to, cap, None] backward = forward[2] = [fr, 0, forward] self.adj[fr].append(forward) self.adj[to].append(backward) def bfs(self, s, t): que = deque([s]) lv = [-1] * (self.N + 1) lv[s] = 0 while que: v = que.popleft() lvv = lv[v] for u, cap, _ in self.adj[v]: if cap and lv[u] == -1: que.append(u) lv[u] = lvv + 1 if u == t: break self.lv = lv def dfs(self, s, t, flow): st = deque([s]) st_f = deque([flow]) while st: v = st[-1] f = st_f[-1] if v == t: for i in range(len(st) - 1, 0, -1): p = st[i - 1] edge = self.adj[p][self.progress[p] - 1] edge[1] -= f edge[2][1] += f return f if self.progress[v] == len(self.adj[v]): st.pop() st_f.pop() continue else: adj_v = self.adj[v] for i in range(self.progress[v], len(adj_v)): i = self.progress[v] self.progress[v] = i + 1 u, cap, rev = adj_v[i] if not cap or self.lv[u] != self.lv[v] + 1: continue else: st.append(u) st_f.append(min(st_f[-1], cap)) break def max_flow(self, s, t): flow = 0 while True: self.bfs(s, t) if self.lv[t] < 0: return flow self.progress = [0] * (self.N + 1) flow_new = self.dfs(s, t, self.inf) while flow_new: flow += flow_new flow_new = self.dfs(s, t, self.inf) H, W = map(int, input().split()) A = [] for _ in range(H): A.append(list(map(int, input().split()))) D = Dinic(H + W + 2) s = H + W + 1 t = s + 1 for h in range(H): D.add_edge(s, h+1, 1) for w in range(W): D.add_edge(H + w + 1, t, 1) edge = [[] for _ in range(5 * 10 ** 5 + 1)] for h in range(H): for w in range(W): a = A[h][w] edge[a].append((h, w)) ans = 0 for a in range(5 * 10 ** 5, 0, -1): if edge[a]: for h, w in edge[a]: D.add_edge(h+1, H+w+1, 1) ans += D.max_flow(s, t) D = Dinic(H + W + 2) s = H + W + 1 t = s + 1 for h in range(H): D.add_edge(s, h + 1, 1) for w in range(W): D.add_edge(H + w + 1, t, 1) print(ans) if __name__ == '__main__': main()