Submission #1279127

#	Time	Username	Problem	Language	Result	Execution time	Memory
1279127		MMihalev	Ancient Books (IOI17_books)	C++20	Compilation error	0 ms	0 KiB

books

#include<iostream>
#include<vector>
//#include "books.h"
using namespace std;
const int MAX_N=1e6+6;
int col[MAX_N];
int cols;
int a[MAX_N];
int l[MAX_N];
int r[MAX_N];
int n;
long long ans;
long long minimum_walk(std::vector<int> p, int s)
{
    n=p.size();
    s++;
    for(int i=1;i<=n;i++)
    {
        l[i]=1e9;
        r[i]=-1;
        a[i]=p[i-1]+1;
    }
    ///init stuff

    for(int i=1;i<=n;i++)
    {
        ans+=abs(i-a[i]);
        if(col[i]==0)
        {
            if(i!=s && i==a[i])continue;
            cols++;
            int pos=i;
            while(col[pos]==0)
            {
                l[cols]=min(l[cols],pos);
                r[cols]=max(r[cols],pos);
                col[pos]=cols;
                pos=a[pos];
            }
        }
    }

    int tmpstart=-1,tmpend=-1;
    int compstart=-1,compend=-1;

    vector<int>sep;
    bool has=0;
    int active=0;
    int e=n;
    while(col[e]==0)e--;
    for(int i=1;i<=e;i++)
    {
        if(has && active==0)
        {
            sep.push_back(i-1);
        }

        int curcol=col[i];
        if(l[curcol]==i)
        {
            if(active==0)tmpstart=i;
            has=1;
            active++;
        }
        if(r[curcol]==i)
        {
            if(active==1)
            {
                tmpend=i;
            }
            active--;
        }

        if(tmpstart<=s && s<=tmpend)
        {
            compstart=tmpstart;
            compend=tmpend;
        }
    }


    int ll=s,rr=s;
    int oldl=ll+1,oldr=rr-1;

    while(1)
    {
        if(ll==compstart && rr==compend)break;

        int nl=ll,nr=rr;

        for(int i=ll;i<oldl;i++)
        {
            nl=min(nl,l[col[i]]);
            nr=max(nr,r[col[i]]);
        }
        for(int i=oldr+1;i<=rr;i++)
        {
            nl=min(nl,l[col[i]]);
            nr=max(nr,r[col[i]]);
        }

        if(nl!=ll or nr!=rr)
        {
            oldl=ll;
            oldr=rr;
            ll=nl;
            rr=nr;
        }
        else
        {
            int distr=0,tmpr=rr;
            while(1)
            {
                distr++;
                tmpr++;
                while(col[tmpr]==0)
                {
                    distr++;
                    tmpr++;
                }

                bool foundnew=0;

                /*if(col[tmpl]!=0)
                {
                    int newcomponentl,newcomponentr;
                    tie(newcomponentl,newcomponentr)=findcomponent(tmpl);
                    if(newcomponentr>rr)
                    {
                        ll=newcomponentl;
                        rr=newcomponentr;
                        foundnew=1;
                    }
                    else
                    {
                        ll=newcomponentl;
                    }
                }
                else*/


                int newcomponentl,newcomponentr;
                tie(newcomponentl,newcomponentr)=findcomponent(tmpr);
                if(newcomponentl<ll)
                {
                    foundnew=1;
                }
                else
                {
                    tmpr=newcomponentr;
                }

                if(foundnew)
                {

                }
            }
        }
    }



    if(sep.size()==0)return ans;
    ///cycle stuff


    for(int i=sep.size()-1;i>=0;i--)
    {
        if(sep[i]>=s)ans+=2;
    }
    ///right part


    for(int i=0;i<sep.size();i++)
    {
        if(sep[i]<s)ans+=2;
    }
    ///left part


	return ans;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:143:50: error: 'findcomponent' was not declared in this scope
  143 |                 tie(newcomponentl,newcomponentr)=findcomponent(tmpr);
      |                                                  ^~~~~~~~~~~~~