Submission #42420

#	Time	Username	Problem	Language	Result	Execution time	Memory
42420		yusufake	고대 책들 (IOI17_books)	C++98	0 / 100	2041 ms	488 KiB

books

#include<bits/stdc++.h>
 
using namespace std;
 
#define _   int v, int tl, int tr, int l, int r
#define tm  (tl+tr >> 1)
#define sol v+v,tl,tm,l,r
#define sag v+v+1,tm+1,tr,l,r
 
#define mp make_pair
#define pb push_back
#define st first
#define nd second
 
typedef long long ll;
typedef pair < ll , ll > pp;
 
const int mod = 1e9 + 7;
const int N   = 1e6 + 6;
 
ll H[N],A[N],B[N],L[N],R[N],n,i,l,r,t,x;
 
ll minimum_walk(vector < int > p , int s){
    x = t = 0;
	n = p.size();
    for(i=0;i<n;i++) H[i] = 0;
	for(i=0;i<n;i++){
		x += abs(p[i] - i);
		if(H[i]) continue;
		l = r = i;
		for(x=i; !H[x] ; x = p[x]){
			H[x] = 1;
			l = min(l , i);
			r = max(r , i);
		}
		A[l] = r;
        B[r] = l;
	}
	for(r=-1,i=0;i<n;i++){
		r = max(r , A[i]);
        R[i] = r;
	}
    for(l=n,i=n-1; i>=0 ;i--){
		l = min(l , B[i]);
        L[i] = l;
	}
    
    for(i=n-1; i>=0 && p[i] == i ; i--);
    
    for(x=R[s]+1; x <= i; x = R[x]+1){
        t++;
    }
        
    for(i=0; i<n && p[i] == i ; i++);
    
    for(x=L[s]-1; x >= i ; x = L[x]-1){
        t++;
    }
    
    return x + 2 * t;
}	

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