Submission #1034931

#	Time	Username	Problem	Language	Result	Execution time	Memory
1034931		vjudge1	Ancient Books (IOI17_books)	C++17	0 / 100	0 ms	348 KiB

books

#include "books.h"
#include<bits/stdc++.h>
using namespace std;
int par[100100];
int abp(int n){
    return par[n]?par[n]=abp(par[n]):n;
}
int merge(int a,int b){
    a=abp(a+1);b=abp(b+1);
    if(a-b)par[a]=b;
    return a!=b;
}
long long minimum_walk(std::vector<int> p, int s) {
    long long ans=0;
    int n=p.size(),K=0;
    for(int i=0;i<n;i++)if(i-p[i]) K=i,
        ans+=abs(i-p[i]),merge(i,p[i]);
    for(int i=1;i<=K;i++)
        ans+=2*merge(i-1,i);
    return ans;
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 10
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 30