Submission #610574

#	Time	Username	Problem	Language	Result	Execution time	Memory
610574		1bin	Untitled (POI11_smi)	C++14	100 / 100	930 ms	143980 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, p, w[NMAX], chk[NMAX], vis[NMAX];
vector<pair<int, int>> adj[NMAX];
vector<int> t;
vector<vector<int>> ans;
stack<int> st;

void dfs(int x){
    for(auto& i = w[x]; i < adj[x].size(); i++){
        auto& [nx, e] = adj[x][i];
        if(chk[e]) continue;
        chk[e] = 1;
        dfs(nx);
    }
    t.emplace_back(x);
    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 >> p;
        if(s ^ p) {
            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()) dfs(i);
        
    for(int& x : t) {
        if(vis[x]){
            vector<int> v(1, x);
            while(1){
                int cur = st.top();
                v.emplace_back(cur);
                if(cur == x) break;
                st.pop(); vis[cur] = 0;
            }
            ans.emplace_back(v);
        }
        else st.emplace(x), vis[x] = 1;
    }
    
    cout << ans.size() << '\n';
    for(auto& t : ans){
        cout << t.size()- 1 << ' ';
        for(int x : t) cout << x << ' ';
        cout << '\n';
    }
    return 0;
}

Compilation message (stderr)

smi.cpp: In function 'void dfs(int)':
smi.cpp:15:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for(auto& i = w[x]; i < adj[x].size(); i++){
      |                         ~~^~~~~~~~~~~~~~~
smi.cpp:16:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   16 |         auto& [nx, e] = adj[x][i];
      |               ^
smi.cpp: In function 'int main()':
smi.cpp:42:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         if(w[i] < adj[i].size()) dfs(i);
      |            ~~~~~^~~~~~~~~~~~~~~

• 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