結果
問題 | No.957 植林 |
ユーザー | uwi |
提出日時 | 2019-12-20 20:15:18 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 1,445 ms / 2,000 ms |
コード長 | 2,668 bytes |
コンパイル時間 | 7,352 ms |
コンパイル使用メモリ | 267,100 KB |
最終ジャッジ日時 | 2025-01-08 13:34:32 |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 45 |
コンパイルメッセージ
main.cpp: In instantiation of 'void Dinic<MAXV, T>::addEdge(int, int, T, bool) [with int MAXV = 100000; T = long long int]': main.cpp:86:13: required from here main.cpp:17:41: warning: narrowing conversion of '((Dinic<100000, long long int>*)this)->Dinic<100000, long long int>::adj[b].std::vector<Dinic<100000, long long int>::edge, std::allocator<Dinic<100000, long long int>::edge> >::size()' from 'std::vector<Dinic<100000, long long int>::edge, std::allocator<Dinic<100000, long long int>::edge> >::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing] 17 | adj[a].push_back({b, adj[b].size(), cap, 0}); | ~~~~~~~~~~~^~ main.cpp:18:44: warning: narrowing conversion of '(((Dinic<100000, long long int>*)this)->Dinic<100000, long long int>::adj[a].std::vector<Dinic<100000, long long int>::edge, std::allocator<Dinic<100000, long long int>::edge> >::size() - 1)' from 'std::vector<Dinic<100000, long long int>::edge, std::allocator<Dinic<100000, long long int>::edge> >::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing] 18 | adj[b].push_back({a, adj[a].size() - 1, isDirected ? 0 : cap, 0}); | ~~~~~~~~~~~~~~^~~
ソースコード
#include <bits/stdc++.h> using namespace std; template <int MAXV, class T = int> struct Dinic { const static bool SCALING = true; // non-scaling = V^2E, Scaling=VElog(U) with higher constant int lim = 1; const T INF = numeric_limits<T>::max(); struct edge { int to, rev; T cap, flow; }; int s = MAXV - 2, t = MAXV - 1; int level[MAXV], ptr[MAXV]; vector<edge> adj[MAXV]; void addEdge(int a, int b, T cap, bool isDirected = true) { adj[a].push_back({b, adj[b].size(), cap, 0}); adj[b].push_back({a, adj[a].size() - 1, isDirected ? 0 : cap, 0}); } bool bfs() { queue<int> q({s}); fill_n(level, MAXV, -1); level[s] = 0; while (!q.empty() && level[t] == -1) { int v = q.front(); q.pop(); for (auto e : adj[v]) { if (level[e.to] == -1 && e.flow < e.cap && (!SCALING || e.cap - e.flow >= lim)) { q.push(e.to); level[e.to] = level[v] + 1; } } } return level[t] != -1; } T dfs(int v, T flow) { if (v == t || !flow) return flow; for (; ptr[v] < adj[v].size(); ptr[v]++) { edge &e = adj[v][ptr[v]]; if (level[e.to] != level[v] + 1) continue; if (T pushed = dfs(e.to, min(flow, e.cap - e.flow))) { e.flow += pushed; adj[e.to][e.rev].flow -= pushed; return pushed; } } return 0; } long long calc() { long long flow = 0; for (lim = SCALING ? (1 << 30) : 1; lim > 0; lim >>= 1) { while (bfs()) { fill_n(ptr, MAXV, 0); while (T pushed = dfs(s, INF)) flow += pushed; } } return flow; } }; int n, m; int G[305][305]; int R[305]; int C[305]; Dinic<100000, long long> D; int main() { scanf("%d %d", &n, &m); for(int i = 0;i < n;i++){ for(int j = 0;j < m;j++){ scanf("%d", &G[i][j]); } } for(int i = 0;i < n;i++){ scanf("%d", &R[i]); } for(int i = 0;i < m;i++){ scanf("%d", &C[i]); } for(int i = 0;i < n;i++){ for(int j = 0;j < m;j++){ D.addEdge(i*m+j, D.t, G[i][j]); } } long long ans = 0; for(int i = 0;i < n;i++){ D.addEdge(D.s, n*m+i, R[i]); ans += R[i]; for(int j = 0;j < m;j++){ D.addEdge(n*m+i, i*m+j, R[i]); } } for(int i = 0;i < m;i++){ D.addEdge(D.s, n*m+n+i, C[i]); ans += C[i]; for(int j = 0;j < n;j++){ D.addEdge(n*m+n+i, j*m+i, C[i]); } } ans -= D.calc(); cout << ans << endl; return 0; }