Submission #1165018

#	Time	Username	Problem	Language	Result	Execution time	Memory
1165018		Mighilon	Senior Postmen (BOI14_postmen)	C++20	100 / 100	216 ms	68616 KiB

postmen

#include <bits/stdc++.h>
using namespace std;
 
#ifdef DEBUG
#include "../Library/debug.h"
#else
#define dbg(x...)
#endif
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl; 
 
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define F0R(i, a) for (int i = 0; i < (a); ++i)
#define FORd(i, a, b) for (int i = (b) - 1; i >= (a); --i)
#define F0Rd(i, a) for (int i = (a) - 1; i >= 0; --i)
#define trav(a, x) for (auto& a : x)
#define f first 
#define s second
#define pb push_back
#define sz(x) (int)(x).size()
#define all(x) x.begin(), x.end()
 
const char nl = '\n';
const int INF = 1e9;
const int MOD = 1e9 + 7;
 
void solve(){
	int n,m;
	cin>>n>>m;
	vector<vi> adj(n);
	vi e(m);
	vb vis(m);
	F0R(i,m){
		int a,b;
		cin>>a>>b;
		a--,b--;
		e[i]=a^b;
		adj[a].pb(i);
		adj[b].pb(i);
	}
	vi path;
	function<void(int)> euler=[&](int v)->void{
		while(!adj[v].empty()){
			int id=adj[v].back();
			adj[v].pop_back();
			if(vis[id])continue;
			vis[id]=true;
			euler(e[id]^v);
		}
		path.pb(v);
	};
	vb v_(n);
	ll ans=0;
	F0R(j,n){
		euler(j);
		dbg(path)
		vi tmp;
		trav(i,path){
			tmp.pb(i);
			if(v_[i]){
				cout<<tmp.back()+1<<" ";
				tmp.pop_back();
				while(!tmp.empty()&&tmp.back()!=i){
					cout<<tmp.back()+1<<" ";
					v_[tmp.back()]=false;
					tmp.pop_back();
				}
				cout<<nl;
				assert(!tmp.empty());
				assert(tmp.back()==i);
			}
			else{
				v_[i]=true;
			}
		}
		while(!tmp.empty()){
			v_[tmp.back()]=false;
			tmp.pop_back();
		}
		path.clear();
	}
}
 
int32_t main(){
    ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    
    int TC = 1;
    // cin >> TC;
    while(TC--){
        solve();
    }
    return 0;
}

• Subtask 1: 38 / 38
• Subtask 2: 17 / 17
• Subtask 3: 45 / 45