Submission #1112950

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112950		elotelo966	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1092 ms	1992 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;

//#define int long long
#define OYY LLONG_MAX
#define mod 1000000007
#define faster ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define FOR for(int i=1;i<=n;i++)
#define mid (start+end)/2
#define lim 300005
#define fi first
#define se second

int n,cev;
 
long long count_swaps(std::vector<int> s) {
	n=s.size();
	bool subtask=1;
	for(int i=0;i<n/2;i++){
		if(s[i]>0 || s[i]!=-s[i+n])subtask=0;
	}
	if(subtask){
		int tut=n/2;
		tut--;
		return tut*(tut+1)/2;
	}
	for(int i=0;i<n;i+=2){
		if(s[i]<0){
			int bul=-1;
			for(int j=i+1;j<n;j++){
				if(s[j]==-s[i]){
					bul=j;
					break;
				}
			}
			for(int j=bul;j>i+1;j--){
				swap(s[j],s[j-1]);
				cev++;
			}
		}
		else{
			int bul=-1;
			for(int j=i+1;j<n;j++){
				if(s[j]==-s[i]){
					bul=j;
					break;
				}
			}
			for(int j=bul;j>i;j--){
				swap(s[j],s[j-1]);
				cev++;
			}
		}
	}
	return cev;
}

/*
int main(){
	//faster
	int m;cin>>m;
	
	vector<int> vv;
	
	for(int i=1;i<=m;i++){
		int x;cin>>x;
		vv.push_back(x);
	}
		
	cout<<count_swaps(vv)<<'\n';
	
	return 0;
}
*/

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