Submission #354930

#	Time	Username	Problem	Language	Result	Execution time	Memory
354930		tengiz05	Ancient Books (IOI17_books)	C++17	12 / 100	2087 ms	492 KiB

books

#include "books.h"
#ifndef EVAL
#include "grader.cpp"
#endif
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define pii pair<int,int>
const int N = 1e6+5;
bool bad[N];
int n, a[N], pos[N];
ll calc(int now, int carry, int lvl=0, int got=0){
	if(lvl > 15)return 1e9;
	lvl++;
	bool ok = true;
	for(int i=0;i<n;i++){
		if(a[i] != i)ok=false;
	}if(ok)return got + now;
	ll res = 1e9;
	swap(a[now], carry);
	res = min(res, calc(now, carry, lvl, got));
	swap(a[now], carry);
	if(now+1 < n)res = min(res, calc(now+1, carry, lvl, got+1));
	if(now > 0)res = min(res, calc(now-1, carry, lvl, got+1));
	return res;
}
ll minimum_walk(vector<int> p, int s) {
	n = p.size();
	for(int i=0;i<n;i++){
		a[i] = p[i];
	}
	return calc(s, -1);
}

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