Submission #581774

#	Time	Username	Problem	Language	Result	Execution time	Memory
581774		Koosha_mv	Ancient Books (IOI17_books)	C++14	0 / 100	1 ms	340 KiB

books

#include "books.h"
#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<x.F<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first

const int N=1e6+99;
const ll inf=1e15;

int n,p[N],vis[N];
ll Max[N];

ll minimum_walk(vector<int> p, int s) {
	vector<pair<ll,ll>> vec;
	n=p.size();
	ll mx=0,sum=0,ans=inf;
	f(i,0,n){
		sum+=abs(i-p[i]);
		if(vis[i]) continue ;
		if(p[i]!=i) mx=i;
		int u=i;
		ll l=-inf,r=inf;
		maxm(mx,1ll*i);
		do{
			vis[u]=1;
			if(u<=s) maxm(l,1ll*u);
			if(s<=u) minm(r,1ll*u);
			u=p[u];
		} while(!vis[u]);
		vec.pb({l,r});
	}
	return 2ll*mx+sum;
	sort(all(vec));
	Max[0]=vec[0].S;
	f(i,1,vec.size()) Max[i]=max(Max[i-1],vec[i].S);
	minm(ans,2ll*(s-vec[0].F));
	minm(ans,2ll*(Max[vec.size()-1]-s));
	f_(i,vec.size()-1,1){
		minm(ans,2ll*(s-vec[i].F)+2ll*(Max[i-1]-s));
	}
	return ans+sum;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:9:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 | #define f(i,a,b) for(int i=a;i<b;i++)
......
   52 |  f(i,1,vec.size()) Max[i]=max(Max[i-1],vec[i].S);
      |    ~~~~~~~~~~~~~~              
books.cpp:52:2: note: in expansion of macro 'f'
   52 |  f(i,1,vec.size()) Max[i]=max(Max[i-1],vec[i].S);
      |  ^

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