# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
882957 | Do_you_copy | Senior Postmen (BOI14_postmen) | C++17 | 6 ms | 25632 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
//Then
#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
using namespace std;
using ll = long long;
using ld = long double;
using pii = pair <int, int>;
mt19937_64 Rand(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e6 + 1;
//const int Mod = 1e9 + 7;
//const int inf =
int n, m;
struct TEdge{
int u, v;
bool del;
};
vector <TEdge> e;
vector <int> adj[maxN];
void add_edge(int u, int v){
adj[u].pb(e.size());
adj[v].pb(e.size());
e.pb({u, v, 0});
}
vector <int> euler(int s){
vector <int> res;
vector <int> S(1, s);
while (!S.empty()){
int u = S.back();
while (!adj[u].empty() && e[adj[u].back()].del) adj[u].pop_back();
if (!adj[u].empty()){
auto &i = e[adj[u].back()];
S.pb(i.u ^ i.v ^ u);
i.del = 1;
adj[u].pop_back();
}
else{
res.pb(u);
S.pop_back();
}
}
return res;
}
int visited[maxN];
void Init(){
cin >> n >> m;
for (int i = 1; i <= m; ++i){
int u, v;
add_edge(u, v);
}
vector <int> eulertour = euler(1);
vector <int> ans;
for (int u: eulertour){
if (visited[u]){
int v;
do{
v = ans.back();
visited[v] = 0;
cout << v << " ";
ans.pop_back();
} while (v != u);
cout << "\n";
}
ans.pb(u);
visited[u] = 1;
}
}
#define debug
#define taskname "test"
signed main(){
faster
if (fopen(taskname".inp", "r")){
freopen(taskname".inp", "r", stdin);
freopen(taskname".out", "w", stdout);
}
int tt = 1;
//cin >> tt;
while (tt--){
Init();
}
if (fopen("timeout.txt", "r")){
ofstream timeout("timeout.txt");
timeout << signed(double(clock()) / CLOCKS_PER_SEC * 1000);
timeout.close();
#ifndef debug
cerr << "Time elapsed: " << signed(double(clock()) / CLOCKS_PER_SEC * 1000) << "ms\n";
#endif // debug
}
}
Compilation message (stderr)
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