Submission #139153

#	Time	Username	Problem	Language	Result	Execution time	Memory
139153		triplem5ds	Ancient Books (IOI17_books)	C++14	0 / 100	2 ms	256 KiB

books

#include<bits/stdc++.h>
#include "books.h"
using namespace std;
int cnt;
int solve(int idx, int picked, vector < int > &v){
	if (picked == -1 && v[idx] != idx){
		picked = v[idx];
		v[idx] = -1;
	}
	if (picked == idx){
		swap(v[idx], picked);
	}
	if(idx == v[idx])
    cnt++;
  if(cnt == v.size())
    return 0;
	if (picked > idx || picked == -1)
		return solve(idx + 1, picked, v) + 1;
	else
		return solve(idx - 1, picked, v) + 1;
}
long long minimum_walk(std::vector<int> v, int s) {
	return solve(s, -1, v);
	return 0;
}

Compilation message (stderr)

books.cpp: In function 'int solve(int, int, std::vector<int>&)':
books.cpp:15:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(cnt == v.size())
      ~~~~^~~~~~~~~~~

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