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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#176927 | #5455. TreeScript | Cidoai# | TL | 0ms | 3288kb | C++14 | 1.2kb | 2023-09-12 10:43:11 | 2023-09-12 10:43:11 |
Judging History
answer
#include<cstdio>
inline int read(){
int x=0;
int f=0,ch=0;
while(ch<48||ch>57) f=(ch=='-'),ch=getchar();
while(ch>47&&ch<58) x=(x<<3)+(x<<1)+(ch&15),ch=getchar();
return f?-x:x;
}
inline void write(int x,char end=' '){
if(x==0){
putchar('0');
putchar(end);
return;
}
if(x<0) putchar('-'),x=-x;
int ch[70]={0},cnt=0;
while(x){
ch[cnt++]=(int)(x%10);
x/=10;
}
while(cnt--) putchar(ch[cnt]+48);
putchar(end);
}
inline int max(int x,int y){return x>y?x:y;}
const int N=2e5+5;
int p[N],leaf[N];
struct node{
int to,nxt;
}e[N<<1];
int head[N],cnt;
inline void add(int u,int v){
e[++cnt].to=v;
e[cnt].nxt=head[u];
head[u]=cnt;
}
int can,ans;
inline void dfs(int u){
int son=0;
for(int i=head[u];i;i=e[i].nxt){
++son;
}
for(int i=head[u];i;i=e[i].nxt){
--son;
int v=e[i].to;
if(son==0){
dfs(v);
}
else if(!leaf[v]){
if(!can) can=1,++ans;
dfs(v);
}
else{
if(can) can--;
else ++ans;
dfs(v);
}
}
can++;
}
int main(){
int T=read();
while(T--){
int n=read();
for(int i=1;i<=n;++i){
p[i]=read();
add(p[i],i);
leaf[p[i]]=1;
}
ans=1;
can=0;
dfs(1);
write(ans,'\n');
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3288kb
input:
2 3 0 1 2 7 0 1 2 2 1 4 1
output:
1 2
result:
ok 2 number(s): "1 2"
Test #2:
score: -100
Time Limit Exceeded
input:
1000 197 0 1 1 2 1 4 1 5 8 3 5 1 4 7 12 14 4 7 10 9 12 11 16 10 21 19 22 17 25 13 28 9 5 15 26 26 33 25 15 1 35 6 32 17 37 8 19 43 19 27 29 9 30 6 31 27 35 35 37 13 28 38 57 31 38 8 22 14 33 9 18 62 52 37 10 19 22 60 54 12 38 59 64 65 80 82 28 60 85 78 27 25 71 14 52 6 59 14 87 32 33 41 59 41 88 38 ...