Submission #350325

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
350325	2021-01-19 05:02:09	juggernaut	Parachute rings (IOI12_rings)	C++14	55 / 100	4099 ms	74188 KiB

rings

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#include<bits/stdc++.h>
using namespace std;
vector<int>g[1000005];
bool on[1000005],vis[1000005];
int n,deg[1000005],linker;
bool dfs(int v,int p){
    bool flag=false;
    vis[v]=true;
    for(int to:g[v])if(to!=p){
        if(on[to])continue;
        if(flag)return false;
        if(vis[to])return false;
        if(!dfs(to,v))return false;
        flag=true;
    }
    return true;
}
void dfs2(int v){
    linker++;
    vis[v]=1;
    for(int to:g[v])if(!vis[to])dfs2(to);
}
bool check(){
    for(int i=0;i<n;i++)vis[i]=0;
    for(int i=0;i<n;i++)if(!on[i]&&!vis[i]&&deg[i]<2)if(!dfs(i,i))return false;
    for(int i=0;i<n;i++)if(!vis[i]&&!on[i])return false;
    return true;
}
void Init(int N){n=N;}
void Link(int x,int y){
 
 
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Compilation message (stderr)

rings.cpp: In function 'int CountCritical()':
rings.cpp:77:1: warning: control reaches end of non-void function [-Wreturn-type]
   77 | }
      | ^

• Subtask 1: 20 / 20
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 0 / 14
• Subtask 5: 0 / 31