Submission #1053534

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053534		Unforgettablepl	Ancient Books (IOI17_books)	C++17	0 / 100	2091 ms	348 KiB

books

#include "books.h"
#include <bits/stdc++.h>
using namespace std;

long long minimum_walk(vector<int> p, int s) {
	int n = p.size();
	vector<int> res(n,-1);
	for(int i=0;i<n;i++)res[p[i]]=i;
	long long ans = INFINITY;
	vector<int> moves(n);iota(moves.begin(),moves.end(),0);
	moves.emplace_back(0);
	if(moves==p)return 0ll;
	do {
		long long t = 0;
		vector<int> curr(n);iota(curr.begin(), curr.end(),0);
		int currhand = -1;
		int currpos = 0;
		for(int i=0;i<=n;i++) {
			t+=abs(moves[i]-currpos);
			currpos=moves[i];
			swap(currhand,curr[currpos]);
			if(curr==res) {
				ans = min(ans,t);
				break;
			}
		}
	} while (next_permutation(moves.begin(), moves.end()-1));
	return ans;
}

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:9:18: warning: overflow in conversion from 'float' to 'long long int' changes value from '+Inff' to '9223372036854775807' [-Woverflow]
    9 |  long long ans = INFINITY;
      |                  ^~~~~~~~

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