Submission #59235

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
59235	2018-07-21 09:44:06	TadijaSebez	Parachute rings (IOI12_rings)	C++11	100 / 100	3900 ms	125872 KiB

rings

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#include <stdio.h>
#include <vector>
#include <algorithm>
using namespace std;
#define mp make_pair
#define pb push_back
const int N=1000050;
int n;
struct DSU
{
  int p[N],c[N],deg[N];
  int cyc,my,sz;
  bool ok;
  DSU(){}
  void init(int x)
  {
    my=x;cyc=sz=0;ok=1;
    for(int i=0;i<n;i++) p[i]=i,c[i]=1,deg[i]=0;
  }
  int Find(int x){ return x==p[x]?x:p[x]=Find(p[x]);}
  void Union(int x, int y)
  {
    if(x==my || y==my) return;
    deg[x]++;deg[y]++;
    if(deg[x]>2 || deg[y]>2) ok=0;
    x=Find(x);y=Find(y);
    if(x==y){ cyc++,sz=c[x],ok=0;return;}
    p[x]=y;
    c[y]+=c[x];
  }
 
 
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Compilation message (stderr)

rings.cpp: In function 'void Link(int, int)':
rings.cpp:65:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<E[a].size();i++) Try[i+1].init(E[a][i]);
               ~^~~~~~~~~~~~
rings.cpp:74:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<E[b].size();i++) Try[i+1].init(E[b][i]);
               ~^~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 14 / 14
• Subtask 5: 31 / 31