Submission #1569780


Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
typedef pair<int,P> P1;
typedef pair<P,P> P2;
#define pu push
#define pb push_back
#define mp make_pair
#define eps 1e-7
#define INF 1000000000
#define mod 1000000007
#define fi first
#define sc second
#define rep(i,x) for(int i=0;i<x;i++)
#define repn(i,x) for(int i=1;i<=x;i++)
#define SORT(x) sort(x.begin(),x.end())
#define ERASE(x) x.erase(unique(x.begin(),x.end()),x.end())
#define POSL(x,v) (lower_bound(x.begin(),x.end(),v)-x.begin())
#define POSU(x,v) (upper_bound(x.begin(),x.end(),v)-x.begin())
int n,ok;
vector<int>edge[100005];
int d[100005],num;
void dfs(int v,int u,int dd){
	rep(i,edge[v].size()){
		if(edge[v][i]==u)continue;
		dfs(edge[v][i],v,1-dd);d[v]+=d[edge[v][i]];
	}
	d[v]+=dd?1:-1; if(abs(d[v])>=2) ok = 1;
}
int main(){
	cin>>n; if(n%2==1){puts("First"); return 0;}
	rep(i,n-1){
		int a,b;cin>>a>>b;edge[a].pb(b);edge[b].pb(a);
	}
	dfs(1,-1,0);
	puts(ok?"First":"Second");
}

Submission Info

Submission Time
Task D - Black and White Tree
User IH19980412
Language C++14 (GCC 5.4.1)
Score 900
Code Size 1031 Byte
Status AC
Exec Time 96 ms
Memory 6272 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 91 ms 6272 KB
in10.txt AC 92 ms 6272 KB
in11.txt AC 91 ms 6144 KB
in12.txt AC 10 ms 2944 KB
in13.txt AC 94 ms 6144 KB
in14.txt AC 93 ms 6144 KB
in15.txt AC 96 ms 6144 KB
in16.txt AC 94 ms 6144 KB
in17.txt AC 92 ms 6144 KB
in18.txt AC 92 ms 6144 KB
in19.txt AC 91 ms 6144 KB
in2.txt AC 92 ms 6272 KB
in20.txt AC 91 ms 6144 KB
in21.txt AC 92 ms 6272 KB
in22.txt AC 91 ms 6272 KB
in23.txt AC 94 ms 6144 KB
in24.txt AC 94 ms 6144 KB
in25.txt AC 93 ms 6144 KB
in26.txt AC 92 ms 6144 KB
in27.txt AC 94 ms 6144 KB
in28.txt AC 2 ms 2560 KB
in29.txt AC 2 ms 2560 KB
in3.txt AC 92 ms 6272 KB
in30.txt AC 2 ms 2560 KB
in31.txt AC 95 ms 6144 KB
in32.txt AC 91 ms 6144 KB
in33.txt AC 92 ms 6144 KB
in4.txt AC 91 ms 6272 KB
in5.txt AC 93 ms 6272 KB
in6.txt AC 2 ms 2560 KB
in7.txt AC 92 ms 6272 KB
in8.txt AC 93 ms 6272 KB
in9.txt AC 92 ms 6272 KB
sample1.txt AC 2 ms 2560 KB
sample2.txt AC 2 ms 2560 KB
sample3.txt AC 2 ms 2560 KB