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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#84320 | #5651. Parmigiana With Seafood | AlienCollapsar | WA | 2ms | 3344kb | C++14 | 916b | 2023-03-06 10:37:28 | 2023-03-06 10:37:32 |
Judging History
answer
#include<cstdio>
#include<iostream>
#include<vector>
using namespace std;
const int Maxn=1e5+5;
struct adjacency_list{int nxt,t;}tr[Maxn<<1];
int h[Maxn],tot;
inline void add(int x,int y){
tr[++tot]={h[x],y};h[x]=tot;
}
int fv[Maxn];
int deg[Maxn],cnt[Maxn];
bool vis[Maxn],cur[Maxn];
void dfs(int x,int fa){
fv[x]=fa;cur[x]=cur[fa]^1;
for(int i=h[x];i;i=tr[i].nxt){
int y=tr[i].t;if(y==fa)continue;
dfs(y,x);
}
}
int main(){
int n;cin>>n;
if(~n&1){cout<<n<<'\n';return 0;}
for(int i=2;i<=n;++i){
int x,y;cin>>x>>y;
add(x,y);++deg[x];
add(y,x);++deg[y];
}
dfs(n,0);vis[n]=1;
for(int i=n;i;--i){
if(deg[i]==1||!cur[i]){
cout<<i<<'\n';return 0;
}
int x=i;
for(;vis[x];x=fv[x]){
++cnt[x],++cnt[fv[x]];
vis[x]=1;
}
for(int j=1;j<=n;++j)cout<<cnt[j]<<" \n"[j==n];
if(cnt[x]>2&&cur[x]){
cout<<i<<'\n';return 0;
}
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 2ms
memory: 3324kb
input:
4 1 2 1 3 1 4
output:
4
result:
ok single line: '4'
Test #2:
score: -100
Wrong Answer
time: 2ms
memory: 3344kb
input:
5 1 5 5 3 3 4 4 2
output:
0 0 0 0 1 0 0 0 0 1 3
result:
wrong answer 1st lines differ - expected: '3', found: '0 0 0 0 1'