結果
問題 | No.2573 moving up |
ユーザー | momoyuu |
提出日時 | 2023-12-15 15:58:38 |
言語 | C++23 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,396 ms / 2,000 ms |
コード長 | 3,584 bytes |
コンパイル時間 | 1,785 ms |
コンパイル使用メモリ | 126,068 KB |
実行使用メモリ | 10,304 KB |
最終ジャッジ日時 | 2024-09-27 06:28:14 |
合計ジャッジ時間 | 18,673 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 | 3 ms
6,812 KB |
testcase_01 | AC | 1,382 ms
10,300 KB |
testcase_02 | AC | 1,389 ms
10,180 KB |
testcase_03 | AC | 1,396 ms
10,180 KB |
testcase_04 | AC | 1,376 ms
10,176 KB |
testcase_05 | AC | 1,393 ms
10,304 KB |
testcase_06 | AC | 1,369 ms
10,304 KB |
testcase_07 | AC | 1,281 ms
10,084 KB |
testcase_08 | AC | 106 ms
6,944 KB |
testcase_09 | AC | 225 ms
6,940 KB |
testcase_10 | AC | 908 ms
8,456 KB |
testcase_11 | AC | 173 ms
6,940 KB |
testcase_12 | AC | 532 ms
7,612 KB |
testcase_13 | AC | 1,037 ms
8,928 KB |
testcase_14 | AC | 27 ms
6,940 KB |
testcase_15 | AC | 24 ms
6,944 KB |
testcase_16 | AC | 9 ms
6,944 KB |
testcase_17 | AC | 178 ms
6,940 KB |
testcase_18 | AC | 446 ms
6,944 KB |
testcase_19 | AC | 812 ms
8,296 KB |
testcase_20 | AC | 51 ms
6,944 KB |
testcase_21 | AC | 64 ms
6,940 KB |
testcase_22 | AC | 128 ms
6,940 KB |
testcase_23 | AC | 101 ms
6,944 KB |
testcase_24 | AC | 285 ms
6,944 KB |
testcase_25 | AC | 613 ms
7,892 KB |
testcase_26 | AC | 74 ms
6,944 KB |
testcase_27 | AC | 12 ms
6,944 KB |
testcase_28 | AC | 12 ms
6,944 KB |
testcase_29 | AC | 12 ms
6,940 KB |
testcase_30 | AC | 13 ms
6,940 KB |
ソースコード
#include<iostream> #include<vector> #include<algorithm> using namespace std; using ll = long long; #include<queue> #include<limits> template< typename flow_t, typename cost_t > struct PrimalDual { const cost_t INF; struct edge { int to; flow_t cap; cost_t cost; int rev; bool isrev; }; vector< vector< edge > > graph; vector< cost_t > potential, min_cost; vector< int > prevv, preve; PrimalDual(int V) : graph(V), INF(numeric_limits< cost_t >::max()) {} void add_edge(int from, int to, flow_t cap, cost_t cost) { graph[from].emplace_back((edge) {to, cap, cost, (int) graph[to].size(), false}); graph[to].emplace_back((edge) {from, 0, -cost, (int) graph[from].size() - 1, true}); } cost_t min_cost_flow(int s, int t, flow_t f) { int V = (int) graph.size(); cost_t ret = 0; using Pi = pair< cost_t, int >; priority_queue< Pi, vector< Pi >, greater< Pi > > que; potential.assign(V, 0); preve.assign(V, -1); prevv.assign(V, -1); while(f > 0) { min_cost.assign(V, INF); que.emplace(0, s); min_cost[s] = 0; while(!que.empty()) { Pi p = que.top(); que.pop(); if(min_cost[p.second] < p.first) continue; for(int i = 0; i < graph[p.second].size(); i++) { edge &e = graph[p.second][i]; cost_t nextCost = min_cost[p.second] + e.cost + potential[p.second] - potential[e.to]; if(e.cap > 0 && min_cost[e.to] > nextCost) { min_cost[e.to] = nextCost; prevv[e.to] = p.second, preve[e.to] = i; que.emplace(min_cost[e.to], e.to); } } } if(min_cost[t] == INF) return -1; for(int v = 0; v < V; v++) potential[v] += min_cost[v]; flow_t addflow = f; for(int v = t; v != s; v = prevv[v]) { addflow = min(addflow, graph[prevv[v]][preve[v]].cap); } f -= addflow; ret += addflow * potential[t]; for(int v = t; v != s; v = prevv[v]) { edge &e = graph[prevv[v]][preve[v]]; e.cap -= addflow; graph[v][e.rev].cap += addflow; } } return ret; } void output() { for(int i = 0; i < graph.size(); i++) { for(auto &e : graph[i]) { if(e.isrev) continue; auto &rev_e = graph[e.to][e.rev]; cout << i << "->" << e.to << " (flow: " << rev_e.cap << "/" << rev_e.cap + e.cap << ")" << endl; } } } }; int main(){ cin.tie(nullptr); ios::sync_with_stdio(false); int h,w; cin>>h>>w; int m = h + w + 1; PrimalDual<ll,ll> g(2 + w + w); int st = w + w; int tt = st + 1; int dx[] = {-1,-1,0,0,1,1}; int dy[] = {-1,0,-1,1,0,1}; for(int i = 0;i<w;i++){ g.add_edge(st,i,1,0); g.add_edge(i+w,tt,1,0); vector<vector<int>> vis(m,vector<int>(m,1e9)); int x,y; cin>>x>>y; x--;y--; vis[x][y] = 0; vector<pair<int,int>> que; que.push_back(make_pair(x,y)); for(int j = 0;j<que.size();j++){ int ni = que[j].first; int nj = que[j].second; for(int k = 0;k<6;k++){ int nni = ni + dx[k]; int nnj = nj + dy[k]; if(nni<0||nnj<0||nnj>=w+nni||nni>=m||nnj>=m) continue; if(vis[nni][nnj]<=vis[ni][nj]+1) continue; vis[nni][nnj] = vis[ni][nj] + 1; que.push_back(make_pair(nni,nnj)); } } for(int j = 0;j<w;j++) g.add_edge(i,j+w,1,vis[0][j]); } cout<<g.min_cost_flow(st,tt,w)<<endl; }