#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n, m, u, v;
vector<queue<pair<ll, ll>>> adj;
vector<ll> res;
vector<bool> sus;
void euler(ll s) {
while (!adj[s].empty()) {
ll e = adj[s].front().first;
ll i = adj[s].front().second;
adj[s].pop();
if (!sus[i]) { sus[i] = true; euler(e); }
sus[i] = true;
}
res.push_back(s);
}
int main() {
cin >> n >> m;
adj.resize(n);
sus.resize(m);
vector<ll> deg(n);
ll g = 0;
for (ll i = 0; i < m; i++) {
cin >> u >> v;
adj[u-1].push({v-1, g});
adj[v-1].push({u-1, g++});
}
euler(0);
reverse(res.begin(), res.end());
vector<ll> vst(n+m, -1);
vector<ll> nxt(n+m, -1);
for (ll i = 0; i < res.size(); i++) {
ll node = res[i];
if (vst[node] == -1) {
vst[node] = i;
nxt[node] = res[i+1];
}
else {
ll nd = res[vst[node]];
do {
cout << nd+1 << ' ';
nd = nxt[nd];
} while (nd != res[vst[node]]);
cout << '\n';
nxt[node] = res[i+1];
vst[node] = i;
}
}
}
Compilation message
postmen.cpp: In function 'int main()':
postmen.cpp:39:22: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
39 | for (ll i = 0; i < res.size(); i++) {
| ~~^~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Incorrect |
0 ms |
348 KB |
Edge does not exist or used 3, 7 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Incorrect |
0 ms |
348 KB |
Edge does not exist or used 3, 7 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Incorrect |
0 ms |
348 KB |
Edge does not exist or used 3, 7 |
3 |
Halted |
0 ms |
0 KB |
- |