結果
問題 | No.1678 Coin Trade (Multiple) |
ユーザー | wolgnik |
提出日時 | 2021-09-10 23:35:31 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,088 bytes |
コンパイル時間 | 149 ms |
コンパイル使用メモリ | 82,200 KB |
実行使用メモリ | 245,676 KB |
最終ジャッジ日時 | 2024-06-12 05:01:43 |
合計ジャッジ時間 | 7,278 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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 |
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testcase_00 | AC | 37 ms
54,988 KB |
testcase_01 | AC | 36 ms
54,368 KB |
testcase_02 | AC | 37 ms
56,040 KB |
testcase_03 | TLE | - |
testcase_04 | -- | - |
testcase_05 | -- | - |
testcase_06 | -- | - |
testcase_07 | -- | - |
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testcase_53 | -- | - |
testcase_54 | -- | - |
testcase_55 | -- | - |
testcase_56 | -- | - |
testcase_57 | -- | - |
testcase_58 | -- | - |
ソースコード
import sys input = sys.stdin.readline N, K = map(int, input().split()) from heapq import heappop, heappush, heapify class MinCostFlow(): def __init__(self, n): self.n = n self.graph = [[] for _ in range(n)] self.pos = [] def add_edge(self, fr, to, cap, cost): m = len(self.pos) self.pos.append((fr, len(self.graph[fr]))) self.graph[fr].append([to, len(self.graph[to]), cap, cost]) self.graph[to].append([fr, len(self.graph[fr]) - 1, 0, -cost]) return m def get_edge(self, idx): to, rev, cap, cost = self.graph[self.pos[idx][0]][self.pos[idx][1]] rev_to, rev_rev, rev_cap, rev_cost = self.graph[to][rev] return self.pos[idx][0], to, cap + rev_cap, rev_cap, cost def edges(self): for i in range(len(self.pos)): yield self.get_edge(i) def dual_ref(self, s, t): dist = [2**63 - 1] * self.n dist[s] = 0 vis = [0] * self.n self.pv = [-1] * self.n self.pe = [-1] * self.n queue = [] heappush(queue, (0, s)) while queue: k, v = heappop(queue) if vis[v]: continue vis[v] = True if v == t: break for i in range(len(self.graph[v])): to, rev, cap, cost = self.graph[v][i] if vis[to] or cap == 0: continue cost += self.dual[v] - self.dual[to] if dist[to] - dist[v] > cost: dist[to] = dist[v] + cost self.pv[to] = v self.pe[to] = i heappush(queue, (dist[to], to)) if not vis[t]: return False for v in range(self.n): if not vis[v]: continue self.dual[v] -= dist[t] - dist[v] return True def flow(self, s, t): return self.flow_with_limit(s, t, 2**63 - 1) def flow_with_limit(self, s, t, limit): return self.slope_with_limit(s, t, limit)[-1] def slope(self, s, t): return self.slope_with_limit(s, t, 2**63 - 1) def slope_with_limit(self, s, t, limit): flow = 0 cost = 0 prev_cost = -1 res = [(flow, cost)] self.dual = [0] * self.n while flow < limit: if not self.dual_ref(s, t): break c = limit - flow v = t while v != s: c = min(c, self.graph[self.pv[v]][self.pe[v]][2]) v = self.pv[v] v = t while v != s: to, rev, cap, _ = self.graph[self.pv[v]][self.pe[v]] self.graph[self.pv[v]][self.pe[v]][2] -= c self.graph[v][rev][2] += c v = self.pv[v] d = -self.dual[s] flow += c cost += c * d if prev_cost == d: res.pop() res.append((flow, cost)) prev_cost = cost return res mcf = MinCostFlow(N + 4) s = N + 2 t = N + 3 res = 0 a = [0] * (N + 1) c = 0 for i in range(1, N + 1): x, m = map(int, input().split()) b = list(map(int, input().split())) a[i] = x for j in b: if x - a[j] > 0: mcf.add_edge(i + 1, j - 1, 1, x - a[j]) mcf.add_edge(s, i + 1, 1, 0) mcf.add_edge(j - 1, t, 1, 0) res -= (x - a[j]) c += 1 inf = 10 ** 6 for i in range(1, N + 1): mcf.add_edge(i, i + 1, inf, 0) mcf.add_edge(s, 0, K, 0) mcf.add_edge(N + 1, t, K, 0) res += mcf.flow_with_limit(s, t, K + c)[1] print(-res)