Submission #610564

#	Time	Username	Problem	Language	Result	Execution time	Memory
610564		1bin	Untitled (POI11_smi)	C++14	20 / 100	808 ms	63544 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define all(v) v.begin(), v.end()
typedef long long ll;
const int NMAX = 1e6 + 5;
int n, m, a, b, s, t, w[NMAX], chk[NMAX], vis[NMAX], fin;
vector<pair<int, int>> adj[NMAX];
vector<vector<int>> v;

void dfs(int x, vector<int> & t){
    t.emplace_back(x);
    if(vis[x]) {
        fin = 1; return;
    }
    vis[x] = 1;
    for(int& i = w[x]; i < adj[x].size(); i++){
        auto& [nx, e] = adj[x][i];
        if(chk[e]) continue;
        chk[e] = 1;
        dfs(nx, t);
        if(fin) {
            vis[x] = 0;
            return;
        }
    }
    return;
}

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    
    cin >> n >> m;
    for(int i = 0; i < m; i++){
        cin >> a >> b >> s >> t;
        if(s ^ t) {
            adj[a].emplace_back(b, i);
            adj[b].emplace_back(a, i);
        }
    } 
    
    for(int i = 1; i <= n; i++)
        if(adj[i].size() & 1){
             cout << "NIE"; return 0;
        }
    for(int i = 1; i <= n; i++)
        if(w[i] < adj[i].size()){
            vector<int> t;
            fin = 0; dfs(i, t);
            if(t.size() == 1) continue;
            v.emplace_back(t);
        }
        
    cout << v.size() << '\n';
    for(auto& t : v){
        cout << t.size()- 1 << ' ';
        for(int x : t) cout << x << ' ';
        cout << '\n';
    }
    return 0;
}

Compilation message (stderr)

smi.cpp: In function 'void dfs(int, std::vector<int>&)':
smi.cpp:18:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     for(int& i = w[x]; i < adj[x].size(); i++){
      |                        ~~^~~~~~~~~~~~~~~
smi.cpp:19:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   19 |         auto& [nx, e] = adj[x][i];
      |               ^
smi.cpp: In function 'int main()':
smi.cpp:48:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         if(w[i] < adj[i].size()){
      |            ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10