#include<bits/stdc++.h>
using namespace std;
const int N = 1005;
int n , m;
int F[N][N] , X[N] , par[N];
vector<pair<int , int>> edges;
vector<int> adj[N];
priority_queue<pair<int,int>> pq;
int ok;
int D[N];
void q(int u, int v){
memset(X , 0 , sizeof(X));
memset(par ,0 , sizeof(par));
for(int i = 1; i <= n; ++i){
if(F[i][u] && F[i][v]) X[i] = 1;
}
for(int i = 1; i<= n; ++i) D[i] = 2e9;
D[u] =0;
pq.push({0 , u});
while(pq.size()){
int x = pq.top().second;
pq.pop();
for(int y : adj[x]){
if(X[y] || x == u && y == v)continue;
if(D[y] > D[x] + 1){
par[y] = x;
D[y] = D[x] + 1;
pq.push({D[y] , y});
}
}
}
if(D[v] == 2e9) return;
int U= v;
while(1){
cout << U << " ";
if(U == u)break;
U = par[U];
}
ok = 1;
}
int main (){
ios_base::sync_with_stdio(0); cin.tie(0);
cin >> n >> m;
int u ,v;
for(int i= 0; i< m; ++i){
cin >> u >> v;
F[u][v] = 1; F[v][u] = 1;
adj[u].emplace_back(v); adj[v].emplace_back(u);
edges.emplace_back(u , v);
}
mt19937 rng(time(0));
shuffle(edges.begin() , edges.end() , rng);
//for(auto x : edges)cout << x.first << " " << x.second<<endl;
for(int i = 0; i < min(5000 , (int)edges.size()); ++i){
q(edges[i].first , edges[i].second);
if(ok)break;
}
if(!ok)cout << "no";
return 0;
}
Compilation message
indcyc.cpp: In function 'void q(int, int)':
indcyc.cpp:25:31: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
25 | if(X[y] || x == u && y == v)continue;
| ~~~~~~~^~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
344 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
716 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
716 KB |
Output is correct |
2 |
Correct |
17 ms |
788 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
223 ms |
1632 KB |
Output is correct |
2 |
Correct |
3 ms |
1612 KB |
Output is correct |
3 |
Correct |
3 ms |
1636 KB |
Output is correct |
4 |
Correct |
318 ms |
1612 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
56 ms |
1624 KB |
Output is correct |
2 |
Correct |
211 ms |
1616 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
26 ms |
5564 KB |
Output is correct |
2 |
Correct |
19 ms |
4940 KB |
Output is correct |
3 |
Execution timed out |
1097 ms |
5552 KB |
Time limit exceeded |
4 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
248 ms |
4940 KB |
Output is correct |
2 |
Execution timed out |
1091 ms |
4940 KB |
Time limit exceeded |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
34 ms |
4572 KB |
Expected integer, but "no" found |
2 |
Halted |
0 ms |
0 KB |
- |