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 |
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Set Name | Test Cases |
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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 |