Submission #221531

#	Time	Username	Problem	Language	Result	Execution time	Memory
221531		mathking1021	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1095 ms	3192 KiB

shoes

#include "shoes.h"
#include <iostream>

long long count_swaps(std::vector<int> s)
{
    typedef long long ll;
    using namespace std;
    ll cnt = 0;
    for(ll i = 0; i < s.size(); i+=2)
    {
        for(ll j = i + 1; j < s.size(); j++)
        {
            if(s[i] + s[j] == 0)
            {
                for(ll k = j; k >= i + 2; k--)
                {
                    swap(s[k], s[k - 1]);
                    cnt++;
                }
                break;
            }
        }
        if(s[i] > 0) swap(s[i], s[i + 1]), cnt++;
    }
    return cnt;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:9:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(ll i = 0; i < s.size(); i+=2)
                   ~~^~~~~~~~~~
shoes.cpp:11:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(ll j = i + 1; j < s.size(); j++)
                           ~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 20 / 20
• Subtask 6: 0 / 15