結果
問題 | No.119 旅行のツアーの問題 |
ユーザー | koba-e964 |
提出日時 | 2015-06-18 21:55:45 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 2 ms / 5,000 ms |
コード長 | 2,689 bytes |
コンパイル時間 | 1,009 ms |
コンパイル使用メモリ | 100,008 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-01 06:57:23 |
合計ジャッジ時間 | 1,829 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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 1 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
コンパイルメッセージ
main.cpp: In member function ‘void Dinic::add_edge(int, int, int)’: main.cpp:82:58: warning: narrowing conversion of ‘(&((Dinic*)this)->Dinic::graph.std::vector<std::vector<Dinic::edge> >::operator[](((std::vector<std::vector<Dinic::edge> >::size_type)to)))->std::vector<Dinic::edge>::size()’ from ‘std::vector<Dinic::edge>::size_type’ {aka ‘long unsigned int’} to ‘int’ [-Wnarrowing] 82 | graph[from].push_back((edge) {to, cap, graph[to].size()}); | ~~~~~~~~~~~~~~^~ main.cpp:83:61: warning: narrowing conversion of ‘((&((Dinic*)this)->Dinic::graph.std::vector<std::vector<Dinic::edge> >::operator[](((std::vector<std::vector<Dinic::edge> >::size_type)from)))->std::vector<Dinic::edge>::size() - 1)’ from ‘std::vector<Dinic::edge>::size_type’ {aka ‘long unsigned int’} to ‘int’ [-Wnarrowing] 83 | graph[to].push_back((edge) {from, 0, graph[from].size() - 1}); | ~~~~~~~~~~~~~~~~~~~^~~
ソースコード
#include <algorithm> #include <bitset> #include <cassert> #include <cctype> #include <cmath> #include <cstdio> #include <cstdlib> #include <cstring> #include <ctime> #include <deque> #include <functional> #include <iomanip> #include <iostream> #include <list> #include <map> #include <numeric> #include <queue> #include <set> #include <sstream> #include <stack> #include <string> #include <utility> #include <vector> #define REP(i,s,n) for(int i=(int)(s);i<(int)(n);i++) using namespace std; typedef long long int ll; typedef vector<int> VI; typedef pair<int, int> PI; const double EPS=1e-9; class Dinic { private: struct edge { int to, cap, rev; // rev is the position of reverse edge in graph[to] }; std::vector<std::vector<edge> > graph; std::vector<int> level; std::vector<int> iter; /* Perform bfs and calculate distance from s */ void bfs(int s) { level.assign(level.size(), -1); std::queue<int> que; level[s] = 0; que.push(s); while (! que.empty()) { int v = que.front(); que.pop(); for (int i = 0; i < graph[v].size(); ++i) { edge &e = graph[v][i]; if (e.cap > 0 && level[e.to] == -1) { level[e.to] = level[v] + 1; que.push(e.to); } } } } /* search augment path by dfs. if f == -1, f is treated as infinity. */ int dfs(int v, int t, int f) { if (v == t) { return f; } for (int &i = iter[v]; i < graph[v].size(); ++i) { edge &e = graph[v][i]; if (e.cap > 0 && level[v] < level[e.to]) { int newf = f == -1 ? e.cap : std::min(f, e.cap); int d = dfs(e.to, t, newf); if (d > 0) { e.cap -= d; graph[e.to][e.rev].cap += d; return d; } } } return 0; } public: /* v is the number of vertices (labeled from 0 .. v-1) */ Dinic(int v) : graph(v), level(v, -1), iter(v, 0) {} void add_edge(int from, int to, int cap) { graph[from].push_back((edge) {to, cap, graph[to].size()}); graph[to].push_back((edge) {from, 0, graph[from].size() - 1}); } int max_flow(int s, int t) { int flow = 0; while (1) { bfs(s); if (level[t] < 0) { return flow; } iter.assign(iter.size(), 0); int f; while ((f = dfs(s, t, -1)) > 0) { flow += f; } } } }; int main(void){ int n; cin >> n; const int inf = 0x100000; Dinic din(2 * n + 2); int sum = 0; REP(i, 0, n) { int b, c; cin >> b >> c; din.add_edge(0, 2 + i, c); din.add_edge(2 + n + i, 1, b); din.add_edge(2 + i, 2 + n + i, inf); sum += b + c; } int m; cin >> m; REP(i, 0, m) { int d, e; cin >> d >> e; din.add_edge(2 + e, 2 + n + d, inf); } cout << sum - din.max_flow(0, 1) << endl; }