ABC274C题解

#include <bits/stdc++.h>
using namespace std;
const int MAXN=2e5+5;

// char buf[1<<21],*p1=buf,*p2=buf;
// #define getchar()(p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++)
inline int read()
{
    int x=0,f=1;char ch=getchar();
    while(!isdigit(ch)){ if(ch=='-') f=-1; ch=getchar(); }
    while(isdigit(ch))
        x=(x<<1)+(x<<3)+(ch^48),ch=getchar();
    return x*f;
}

int n,a[MAXN];
int dep[MAXN<<2];

int main()
{
    n=read();
    dep[1]=0;
    for(int i=1;i<=n;i++) a[i]=read();
    for(int i=1;i<=n;i++)
    {
        dep[i*2]=dep[i*2+1]=dep[a[i]]+1;
    }
    for(int i=1;i<=n*2+1;i++) printf("%d\n",dep[i]);
    return 0;
}