結果
| 問題 |
No.241 出席番号(1)
|
| ユーザー |
airis
|
| 提出日時 | 2015-07-11 02:07:59 |
| 言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
| 結果 |
RE
(最新)
AC
(最初)
|
| 実行時間 | - |
| コード長 | 2,689 bytes |
| コンパイル時間 | 1,119 ms |
| コンパイル使用メモリ | 95,484 KB |
| 実行使用メモリ | 6,824 KB |
| 最終ジャッジ日時 | 2024-11-21 10:06:11 |
| 合計ジャッジ時間 | 10,693 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | RE * 3 |
| other | RE * 29 |
コンパイルメッセージ
main.cpp: In member function ‘void Graph::add_edge(int, int, int)’:
main.cpp:51:69: warning: narrowing conversion of ‘(&((Graph*)this)->Graph::G.std::vector<std::vector<Edge> >::operator[](((std::vector<std::vector<Edge> >::size_type)to)))->std::vector<Edge>::size()’ from ‘std::vector<Edge>::size_type’ {aka ‘long unsigned int’} to ‘int’ [-Wnarrowing]
51 | G[from].push_back((Edge){to, cap, G[to].size()});
| ~~~~~~~~~~^~
main.cpp:52:72: warning: narrowing conversion of ‘((&((Graph*)this)->Graph::G.std::vector<std::vector<Edge> >::operator[](((std::vector<std::vector<Edge> >::size_type)from)))->std::vector<Edge>::size() - 1)’ from ‘std::vector<Edge>::size_type’ {aka ‘long unsigned int’} to ‘int’ [-Wnarrowing]
52 | G[to].push_back((Edge){from, 0, G[from].size() - 1});
| ~~~~~~~~~~~~~~~^~~
main.cpp: In member function ‘int Graph::bfs(int)’:
main.cpp:71:17: warning: no return statement in function returning non-void [-Wreturn-type]
71 | }
| ^
ソースコード
#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <numeric>
#include <bitset>
#include <complex>
#define rep(x, to) for (int x = 0; x < (to); x++)
#define REP(x, a, to) for (int x = (a); x < (to); x++)
#define foreach(itr, x) for (typeof((x).begin()) itr = (x).begin(); itr != (x).end(); itr++)
#define EPS (1e-14)
using namespace std;
typedef long long ll;
typedef pair<int, int> PII;
typedef pair<ll, ll> PLL;
typedef complex<double> Complex;
typedef vector< vector<int> > Mat;
int N;
int a[55];
struct Edge {
int to;
int cap;
int rev;
};
class Graph {
public:
vector < vector<Edge> > G;
vector<int> level;
vector<int> iter;
Graph(int n) {
G.resize(n + 5);
level.resize(n + 5, 0);
iter.resize(n + 5, 0);
}
void add_edge(int from, int to, int cap) {
G[from].push_back((Edge){to, cap, G[to].size()});
G[to].push_back((Edge){from, 0, G[from].size() - 1});
}
//s:source
int bfs(int s) {
for (int i = 0; i < level.size(); i++) level[i] = -1;
queue<int> que;
level[s] = 0;
que.push(s);
while (!que.empty()) {
int v = que.front(); que.pop();
for (int i = 0; i < G[v].size(); i++) {
Edge &e = G[v][i];
if (e.cap > 0 && level[e.to] < 0) {
level[e.to] = level[v] + 1;
que.push(e.to);
}
}
}
}
//t:sink
int dfs(int v, int t, int f) {
if (v == t) return f;
for (int &i = iter[v]; i < G[v].size(); i++) {
Edge &e = G[v][i];
if (e.cap > 0 && level[v] < level[e.to]) {
int d = dfs(e.to, t, min(f, e.cap));
if (d > 0) {
e.cap -= d;
G[e.to][e.rev].cap += d;
return d;
}
}
}
return 0;
}
//s:source
//t:sink
int max_flow(int s, int t) {
int flow = 0;
for (;;) {
bfs(s);
if (level[t] < 0) return flow;
for (int i = 0; i < iter.size(); i++) iter[i] = 0;
int f;
while (f = dfs(s, t, 1e+9 + 7)) {
flow += f;
}
}
}
};
void solve() {
Graph graph(105);
int S = N + N;
int T = N + N + 1;
//u -> v;
rep(i, N) {
rep(j, N) {
if (j == a[i]) continue;
graph.add_edge(i, j + N, 1);
}
}
//S -> u; v -> T;
rep(i, N) {
graph.add_edge(S, i, 1);
graph.add_edge(i + N, T, 1);
}
int flow = graph.max_flow(S, T);
if (flow != N) {
cout << -1 << endl;
} else {
rep(i, N) {
rep(j, graph.G[i].size()) {
Edge &e = graph.G[i][j];
if (graph.G[e.to][e.rev].cap > 0) {
cout << e.to - N << endl;
break;
}
}
}
}
}
int main() {
cin >> N;
rep(i, N) cin >> a[i];
solve();
return 0;
}
airis