Submission #1590435


Source Code Expand

#include <bits/stdc++.h>

using namespace std;

inline int read()
{
	int x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1; ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0'; ch=getchar();}
	return x*f;
}
struct edge
{
	int v,next;
}vs[300010];
int st[300010],ee,n,size[300010],fg;
inline void addedge(int u,int v)
{
	vs[++ee].v=v;vs[ee].next=st[u];st[u]=ee;
}
inline int dfs(int rt,int pr)
{
	int ret=1,cnt=0;
	for(int i=st[rt];i;i=vs[i].next)
	{
		if(vs[i].v==pr) continue;
		cnt+=dfs(vs[i].v,rt);
	}
	if(cnt>1) fg=1; 
	if(cnt==1) ret=0; 
	return ret;
}
int main()
{
	n=read(); 
	for(int i=1;i<n;i++)
	{
		int u=read(), v=read();
		addedge(u,v); addedge(v,u);
	}
	int x=dfs(1,0); if(x) fg=1;
	if(fg) cout << "First" << endl;
	else cout << "Second" << endl;
}

Submission Info

Submission Time
Task D - Black and White Tree
User wcz111
Language C++14 (GCC 5.4.1)
Score 900
Code Size 824 Byte
Status AC
Exec Time 16 ms
Memory 2688 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 900 / 900
Status
AC × 3
AC × 39
Set Name Test Cases
Sample sample1.txt, sample2.txt, sample3.txt
All sample1.txt, sample2.txt, sample3.txt, in1.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in2.txt, in20.txt, in21.txt, in22.txt, in23.txt, in24.txt, in25.txt, in26.txt, in27.txt, in28.txt, in29.txt, in3.txt, in30.txt, in31.txt, in32.txt, in33.txt, in4.txt, in5.txt, in6.txt, in7.txt, in8.txt, in9.txt, sample1.txt, sample2.txt, sample3.txt
Case Name Status Exec Time Memory
in1.txt AC 15 ms 2688 KB
in10.txt AC 15 ms 2688 KB
in11.txt AC 16 ms 2688 KB
in12.txt AC 3 ms 2304 KB
in13.txt AC 15 ms 2688 KB
in14.txt AC 15 ms 2688 KB
in15.txt AC 15 ms 2688 KB
in16.txt AC 15 ms 2688 KB
in17.txt AC 15 ms 2688 KB
in18.txt AC 15 ms 2688 KB
in19.txt AC 15 ms 2688 KB
in2.txt AC 15 ms 2688 KB
in20.txt AC 15 ms 2688 KB
in21.txt AC 16 ms 2688 KB
in22.txt AC 16 ms 2688 KB
in23.txt AC 15 ms 2688 KB
in24.txt AC 15 ms 2688 KB
in25.txt AC 15 ms 2688 KB
in26.txt AC 15 ms 2688 KB
in27.txt AC 15 ms 2688 KB
in28.txt AC 1 ms 2304 KB
in29.txt AC 15 ms 2688 KB
in3.txt AC 15 ms 2688 KB
in30.txt AC 15 ms 2688 KB
in31.txt AC 15 ms 2688 KB
in32.txt AC 15 ms 2688 KB
in33.txt AC 15 ms 2688 KB
in4.txt AC 15 ms 2688 KB
in5.txt AC 15 ms 2688 KB
in6.txt AC 15 ms 2688 KB
in7.txt AC 15 ms 2688 KB
in8.txt AC 16 ms 2688 KB
in9.txt AC 15 ms 2688 KB
sample1.txt AC 2 ms 2304 KB
sample2.txt AC 1 ms 2304 KB
sample3.txt AC 1 ms 2304 KB