Submission #739474

#	Time	Username	Problem	Language	Result	Execution time	Memory
739474		Ahmed57	Untitled (POI11_smi)	C++14	100 / 100	1441 ms	111916 KiB

Main

#include <bits/stdc++.h>

using namespace std;
vector<int> v;int in[100001],vis[100001];
int visited[1000001];
vector<pair<int,int>> adj[100001];int cnt = 0;
map<pair<int,int>,int> mp;
void dfs(int i){
    vis[i] = 1;
    while(adj[i].size()){
        if(visited[adj[i].back().second]){
            adj[i].pop_back();
            continue;
        }
        visited[adj[i].back().second] =1;
        int x = adj[i].back().first;
        adj[i].pop_back();
        dfs(x);
    }
    v.push_back(i);
}
int main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int n,m;
    cin>>n>>m;
    for(int i = 0;i<m;i++){
        int a,b,c,d;
        cin>>a>>b>>c>>d;
        if(c==d)continue;
        adj[a].push_back({b,i});
        adj[b].push_back({a,i});
        in[a]++;in[b]++;
    }
    for(int i = 1;i<=n;i++){
        if(in[i]%2){
            cout<<"NIE\n";
            return 0;
        }
    }
    vector<vector<int>> all;
    for(int i = 1;i<=n;i++){
        if(!vis[i]){
            v.clear();
            dfs(i);
            vector<int>tmp;
            reverse(v.begin(),v.end());
            map<int,int>de;
            for(int j = 0;j<v.size();j++){
                tmp.push_back(v[j]);
                de[v[j]]++;
                if(de[v[j]]>1){
                    vector<int>hla;
                    int cn = 0;
                    while(cn<2){
                        cn+=(tmp.back()==v[j]);
                        de[tmp.back()]--;
                        hla.push_back(tmp.back());tmp.pop_back();
                    }
                    reverse(hla.begin(),hla.end());
                    all.push_back(hla);
                    tmp.push_back(v[j]);
                    de[v[j]]++;
                }
            }
        }
    }
    cout<<all.size()<<"\n";
    for(auto i:all){cout<<i.size()-1<<" ";for(auto j:i)cout<<j<<" ";cout<<endl;}
    return 0;
}
//1221

Compilation message (stderr)

smi.cpp: In function 'int main()':
smi.cpp:48:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |             for(int j = 0;j<v.size();j++){
      |                           ~^~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10