제출 #1172184

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1172184		ivaziva	어르신 집배원 (BOI14_postmen)	C++20	100 / 100	295 ms	74804 KiB

postmen

#include <bits/stdc++.h>

using namespace std;

#define MAXN 500001

int n,m;
vector<pair<int,int>> adj[MAXN];
vector<int> path;bool pos[MAXN];
vector<int> ans[MAXN];
stack<int> nodes;
int pojavljivanje[MAXN];

void dfs(int node)
{
    while (!adj[node].empty())
    {
        pair<int,int> par=adj[node].back();adj[node].pop_back();
        if (pos[par.second]) continue;
        pos[par.second]=true;dfs(par.first);
    }
    path.push_back(node);
}

int main()
{
    ios_base::sync_with_stdio(false);
    ios::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);cin>>n>>m;
    for (int i=1;i<=m;i++) {int x,y;cin>>x>>y;adj[x].push_back({y,i});adj[y].push_back({x,i});}
    dfs(1);int trenkomp=0;
    for (int pos=1;pos<=path.size();pos++)
    {
        int node=path[pos-1];if (pojavljivanje[node]==0) {pojavljivanje[node]=pos;nodes.push(node);continue;}
        ans[trenkomp].push_back(node);
        while (nodes.top()!=node) {ans[trenkomp].push_back(nodes.top());pojavljivanje[nodes.top()]=0;nodes.pop();}
        nodes.pop();trenkomp++;pojavljivanje[node]=pos;nodes.push(node);
    }
    for (int komp=0;komp<trenkomp;komp++)
    {
        for (int node:ans[komp]) cout<<node<<" ";
        cout<<endl;
    }
}

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