Submission #1610659
Source Code Expand
#include<cstdio> const int N=1e5+7; int n,es[N*2],enx[N*2],e0[N],ep=2,del[N],flag=0; void f1(int w,int pa){ for(int i=e0[w];i;i=enx[i]){ int u=es[i]; if(u==pa)continue; f1(u,w); } if(!del[w]&&!del[pa])del[w]=del[pa]=1; if(!del[w])flag=1; } int main(){ scanf("%d",&n); for(int i=1,a,b;i<n;++i){ scanf("%d%d",&a,&b); es[ep]=b;enx[ep]=e0[a];e0[a]=ep++; es[ep]=a;enx[ep]=e0[b];e0[b]=ep++; } del[0]=1; f1(1,0); puts(flag?"First":"Second"); return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - Black and White Tree |
User | ccz181078 |
Language | C++14 (GCC 5.4.1) |
Score | 900 |
Code Size | 492 Byte |
Status | AC |
Exec Time | 23 ms |
Memory | 2560 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:14:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ ./Main.cpp:16:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 900 / 900 | ||||
Status |
|
|
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 | 23 ms | 2560 KB |
in10.txt | AC | 23 ms | 2560 KB |
in11.txt | AC | 23 ms | 2560 KB |
in12.txt | AC | 2 ms | 384 KB |
in13.txt | AC | 22 ms | 2560 KB |
in14.txt | AC | 23 ms | 2560 KB |
in15.txt | AC | 23 ms | 2560 KB |
in16.txt | AC | 23 ms | 2560 KB |
in17.txt | AC | 23 ms | 2560 KB |
in18.txt | AC | 23 ms | 2560 KB |
in19.txt | AC | 23 ms | 2560 KB |
in2.txt | AC | 23 ms | 2560 KB |
in20.txt | AC | 23 ms | 2560 KB |
in21.txt | AC | 23 ms | 2560 KB |
in22.txt | AC | 23 ms | 2560 KB |
in23.txt | AC | 23 ms | 2560 KB |
in24.txt | AC | 23 ms | 2560 KB |
in25.txt | AC | 23 ms | 2560 KB |
in26.txt | AC | 23 ms | 2560 KB |
in27.txt | AC | 23 ms | 2560 KB |
in28.txt | AC | 1 ms | 128 KB |
in29.txt | AC | 22 ms | 2560 KB |
in3.txt | AC | 22 ms | 2560 KB |
in30.txt | AC | 23 ms | 2560 KB |
in31.txt | AC | 23 ms | 2560 KB |
in32.txt | AC | 23 ms | 2560 KB |
in33.txt | AC | 23 ms | 2560 KB |
in4.txt | AC | 22 ms | 2560 KB |
in5.txt | AC | 22 ms | 2560 KB |
in6.txt | AC | 22 ms | 2560 KB |
in7.txt | AC | 22 ms | 2560 KB |
in8.txt | AC | 22 ms | 2560 KB |
in9.txt | AC | 22 ms | 2560 KB |
sample1.txt | AC | 1 ms | 128 KB |
sample2.txt | AC | 1 ms | 128 KB |
sample3.txt | AC | 1 ms | 128 KB |