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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define pb push_back
  4. #define REP(i, a, b) for (int i = a; i <= b; i++)
  5. #define BACK(i, a, b) for (int i = a; i >= b; i--) 
  6. #define MOD 1000000007
  7. #define PI 4 * atan(1)
  8. #define sz(A) (int)A.size()
  9. typedef long long ll;
  10. typedef vector<int> vi;
  11. typedef pair<int, int> pii;
  12. typedef vector<long long> vll;
  13. typedef long int int32;
  14. typedef unsigned long int uint32;
  15. typedef long long int int64;
  16. typedef unsigned long long int uint64;
  17.  
  18. int t,n,u;
  19. set<int> adj[104];
  20. bool visited[104];
  21. int a[104][104];
  22. void dfs(int u){
  23.     visited[u] = true;
  24.     for(int x: adj[u]){
  25.         if(!visited[x]){
  26.             dfs(x);
  27.         }
  28.     }
  29. }
  30. int tplt(){
  31.     int res= 0 ;
  32.     for(int i=1; i<=n; i++){
  33.         if(!visited[i]){
  34.             res++;
  35.             dfs(i);
  36.         }
  37.     }
  38.     return  res;
  39. }
  40.  
  41. void solve(int test){
  42.     freopen("CT.INP", "r", stdin);
  43.     freopen("CT.OUT", "w",stdout);
  44.     cin >> t >> n;
  45.     if(t == 2) cin >> u;
  46.     for(int i=1; i<=n; i++){
  47.         for(int j=1; j<=n; j++){
  48.             cin >> a[i][j];
  49.             if(a[i][j] && i < j){
  50.                 adj[i].insert(j);
  51.                 adj[j].insert(i);
  52.             }
  53.         }
  54.     }
  55.     if(t == 1){
  56.         int c0 = 0, c1 = 0;
  57.         vector<int> deg(n+1 , 0);
  58.         for(int i=1; i <=n; i++){  
  59.             deg[i] += adj[i].size();
  60.         }
  61.         for(int i=1; i<=n; i++){
  62.             if(deg[i] & 1) c1++;
  63.             else c0++;
  64.         }
  65.         if(tplt()> 1){
  66.             cout << 0;
  67.             return;
  68.         }
  69.         if(c0 == n) cout << 1;
  70.         else if(c1 == 2) cout << 2;
  71.         else cout << 0;       
  72.     }else{
  73.         vector<int> ce;
  74.         stack<int>st;
  75.         st.push(u);
  76.         while(!st.empty()){
  77.             int f = st.top();
  78.             if(adj[f].size() == 0){
  79.                 ce.push_back(f);
  80.                 st.pop();
  81.             }
  82.             else{
  83.                 int x = *adj[f].begin();
  84.                 st.push(x);
  85.                 adj[f].erase(x);
  86.                 adj[x].erase(f);
  87.             }
  88.         }
  89.         for(int i=ce.size()-1; i >= 0; i--){
  90.             cout << ce[i] << " ";
  91.         }
  92.     }
  93. }   
  94. int main(){
  95.     ios_base::sync_with_stdio(false);
  96.     cin.tie(NULL);
  97.     cout.tie(NULL);
  98.     int typetest = 0;
  99.     if (typetest){
  100.         int t;
  101.         cin >> t;
  102.         cin.ignore();
  103.         REP(i, 1, t){
  104.             solve(i);
  105.         }
  106.     }
  107.     else solve(0);
  108. }
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/ak2pmy
language:
C++14 (gcc 8.3)
created:
6 days ago
visibility:
public

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