Submission #1225406

#	Time	Username	Problem	Language	Result	Execution time	Memory
1225406		walizamanee	Ancient Books (IOI17_books)	C++20	12 / 100	0 ms	328 KiB

books

#include<bits/stdc++.h>
#include "books.h"
using namespace std;
using ll = long long;
int here[2000001] , one , two , boro;
long long ans;
long long minimum_walk(vector<int> p, int s) {
	int n = p.size();
	for( int z = 0; z < n; z++ ) {
		here[z] = 0;
	}
	one = s;
	ans = 0;
	boro = 0;
	for( int z = s; z < n; z++ ) {
		if( here[z] == 0 && p[z] != z ) {
			//ans += (ll)(2) * (ll)(abs(one - z));
			if( boro < z ) ans += 2;
			two = z;
			while(here[two] == 0 ) {
				boro = max( boro , two );
				here[two] = 1;
				ans += (ll)(abs(two - p[two]));
				two = p[two];
			}
			one = z;
		}
		
	} 
	return ans;
}

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