Submission #617598

#	Time	Username	Problem	Language	Result	Execution time	Memory
617598		AbdelmagedNour	Ancient Books (IOI17_books)	C++17	50 / 100	1469 ms	69736 KiB

books

#include<bits/stdc++.h>
using namespace std;
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>st1;
tree<int,null_type,greater<int>,rb_tree_tag,tree_order_statistics_node_update>st2;
#include "books.h"
//#include"grader.cpp"

long long minimum_walk(vector<int> p, int s) {
    st1.clear();
    st2.clear();
    int n=p.size();
    vector<int>seg1(n),mx(n+1);
    long long res=0;
    for(int i=0;i<n;i++){
        st2.insert(p[i]);
        seg1[i]=st2.order_of_key(i);
    }
    for(int i=n-1;i>=0;i--)mx[i]=max(mx[i+1],seg1[i]);
    for(int i=0;i<n-1;i++){
        if(seg1[i]==0&&mx[i])res+=2;
        else res+=seg1[i]+seg1[i];
    }
    return res;
}

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