Submission #236805

#	Time	Username	Problem	Language	Result	Execution time	Memory
236805		michao	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1093 ms	3200 KiB

shoes

#include <bits/stdc++.h>
#define ll long long int
#define mp make_pair
#define pb push_back
#define ld long double
#define pii pair<int,int>
#define sz(x) (int)x.size()
#define piii pair<pii,pii>
#define precise cout<<fixed<<setprecision(10)
#define st first
#define nd second
#define ins insert
#define vi vector<int>
#define BOOST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
using namespace std;
const int MAX=1e5+5;
int pos[MAX*2];
ll count_swaps(vi tab)
{
	int ans=0;
	int n=sz(tab);
	int ile=sz(tab)/2;
	
	for (int i=0;i<n-1;i+=2)
	{
		int wsk=0;
	  wsk=-tab[i];
		int akt=-1e6+5;
		for (int j=i+1;j<n;j++)
		{
			if (tab[j]==wsk)
			{
				akt=j;
				break;
			}
		}
	//	cout<<"TERAZ "<<akt<<" "<<wsk<<"\n";
		if (akt>i)
		{
			for (int j=akt;j>=i+2;j--)swap(tab[j],tab[j-1]),ans++;
			if (tab[i]>tab[i+1])swap(tab[i],tab[i+1]),ans++;
		}
		else if (tab[i]>tab[i+1])swap(tab[i],tab[i+1]),ans++;
		//cout<<"ZAWARTOSC "<<n<<"\n";
    //for (auto it:tab)cout<<it<<" ";
    //cout<<"\n";
	}
	return ans;
}
/*
int main()
{
	cout<<count_swaps({-2, 2, 2, -2, -2, 2});
}
*/

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:22:6: warning: unused variable 'ile' [-Wunused-variable]
  int ile=sz(tab)/2;
      ^~~

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