Submission #1008965

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1008965	2024-06-27 07:07:28	Rifal	Parachute rings (IOI12_rings)	C++14	0 / 100	288 ms	52812 KiB

rings

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#include <bits/stdc++.h>
//#include "rings.h"
using namespace std;
const int N = 1e6 + 5;
int n;
int cnt = 0;
vector<int> v[N];
int deg[N];
void Init(int N_) {
  n = N_;
}
void Link(int A, int B) {
  deg[A]++; deg[B]++;
  if(deg[A] > 2) cnt++;
  if(deg[B] > 2) cnt++;
  v[A].push_back(B);
  v[B].push_back(A);
}
int CountCritical() {
  int sol = 0;
  for(int i = 0; i < n; i++) {
    int cur = cnt;
    if(deg[i] > 2) cur--;
    for(auto j : v[i]) {
      if(deg[j] == 3) cur--;
    }
    if(cur == 0) sol++;
  }
 
 
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