Submission #99185

#	Time	Username	Problem	Language	Result	Execution time	Memory
99185		figter001	Ancient Books (IOI17_books)	C++14	50 / 100	278 ms	22884 KiB

books

#include "books.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
const int nax = 1e6+50;

ll ans,sum[nax];

ll minimum_walk(vector<int> p, int s) {
	ans = 0;
	int n = p.size();
	int to = 0;
	for(int i=0;i<n;i++){
		int l = min(i,p[i]);
		int r = max(i,p[i]);
		sum[l]++;
		sum[r]--;
		if(i != p[i])
			to = i;
	}
	for(int i=0;i<to;i++){
		if(i)sum[i] += sum[i-1];
		ans += max(2ll,sum[i]);
	}
	return ans;
}

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