Submission #332367

#	Time	Username	Problem	Language	Result	Execution time	Memory
332367		nicholask	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	32 ms	1900 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
long long count_swaps(vector <int> s){
	int n=(s.size()>>1);
	if (n<=1000){
		long long ans=0;
		for (int i=0; i<n+n; i+=2){
			int wh;
			for (int j=1; ; j++){
				if (s[0]*-1==s[j]){
					wh=j;
					break;
				}
			}
			if (s[0]>0) ans++;
			ans+=wh-1;
			s.erase(s.begin()+wh);
			s.erase(s.begin());
		}
		return ans;
	} else {
		return n*1ll*(n-1);
	}
}
/*
signed main(){
	int n;
	cin>>n;
	vector <int> v(n);
	for (int i=0; i<n; i++) cin>>v[i];
	cout<<count_swaps(v);
}
*/

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