Submission #537498

#	Time	Username	Problem	Language	Result	Execution time	Memory
537498		andrei_boaca	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1073 ms	3900 KiB

shoes

#include <bits/stdc++.h>
#include "shoes.h"
//#include "grader.cpp"
using namespace std;
typedef long long ll;
ll ans=0;
int n,v[200005];
void bring(int poz,int i)
{
    for(int j=poz-1;j>=i;j--)
    {
        ans++;
        swap(v[j],v[j+1]);
    }
}
ll count_swaps(vector<int> S)
{
    n=S.size();
    for(int i=0;i<S.size();i++)
        v[i+1]=S[i];
    for(int i=1;i<=n;i++)
    {
        if(i%2==1)
        {
            if(v[i]<0)
                continue;
            ll val=-v[i];
            ll poz=0;
            for(int j=i+1;j<=n;j++)
                if(v[j]==val)
                {
                    poz=j;
                    break;
                }
            bring(poz,i);
        }
        if(i%2==0)
        {
            if(v[i]==-v[i-1])
                continue;
            ll val=-v[i-1];
            ll poz=0;
            for(int j=i+1;j<=n;j++)
                if(v[j]==val)
                {
                    poz=j;
                    break;
                }
            bring(poz,i);
        }
    }
    return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'll count_swaps(std::vector<int>)':
shoes.cpp:19:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for(int i=0;i<S.size();i++)
      |                 ~^~~~~~~~~

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