Submission #49004

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
49004	2018-05-21 06:39:28	Namnamseo	Parachute rings (IOI12_rings)	C++17	100 / 100	832 ms	50460 KiB

rings

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#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> pp;
vector<pp> links;
int n;
struct simulator {
  int deg [1000010];
  int oppo[1000010];
  bool crit;
  int R;
  void init(int rem){
    R=rem;
    for(int i=0; i<n; ++i) deg[i]=0, oppo[i]=i;
    crit=true;
    for(auto& q:links){
      update(q.first, q.second);
    }
  }
  void update(int a,int b){
    if(!crit) return;
    if(a!=R && b!=R){
      ++deg[a], ++deg[b];
      int p=oppo[a], q=oppo[b];
      if(b==p){
        crit=false;
 
 
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• Subtask 1: 20 / 20
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 14 / 14
• Subtask 5: 31 / 31