Submission #99182

#	Time	Username	Problem	Language	Result	Execution time	Memory
99182		figter001	Ancient Books (IOI17_books)	C++17	12 / 100	3 ms	384 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;

int ans;
map<pair<int,pair<int,pair<int,pair<int,vector<int>>>>>,int> mp;

void calc(int idx,vector<int> c,int cst,int h,int l){
	if(cst > ans || idx < 0 || idx >= c.size())return;
	if(mp[{idx,{cst,{h,{l,c}}}}] == 1)return;
	mp[{idx,{cst,{h,{l,c}}}}] = 1;
	bool f = 1;
	for(int i = 0;i<c.size();i++)
		if(i != c[i])
			f = 0;
	if(f && idx == 0){
		ans = min(cst,ans);
		return;
	}
	calc(idx+1,c,cst+1,h,1);
	calc(idx-1,c,cst+1,h,1);
	swap(h,c[idx]);
	if(l)
		calc(idx,c,cst,h,0);
	calc(idx+1,c,cst+1,h,1);
	calc(idx-1,c,cst+1,h,1);
}


ll minimum_walk(vector<int> p, int s) {
	ans = 0;
	// calc(s,p,0,-1,0);
	int n = p.size();
	int f = -1;
	for(int i=0;i<n;i++){
		if(i != p[i]){
			ans += abs(p[i] - i);
			if(f == -1)
				f = i;
		}
	}
	if(f == -1)
		ans = 0;
	else
		ans += f * 2;
	return ans;
}

Compilation message (stderr)

books.cpp: In function 'void calc(int, std::vector<int>, int, int, int)':
books.cpp:14:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(cst > ans || idx < 0 || idx >= c.size())return;
                             ~~~~^~~~~~~~~~~
books.cpp:18:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0;i<c.size();i++)
                ~^~~~~~~~~

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