Submission #1288840

#	Time	Username	Problem	Language	Result	Execution time	Memory
1288840		muhammad-mutahir	Arranging Shoes (IOI19_shoes)	C++20	10 / 100	1 ms	344 KiB

shoes

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

long long count_swaps(vector<int> s) {
	long long ans = 0;
	int n = s.size();
	map<int,int>cnt;
	for(int i = 0;i<n;i++){
		cnt[abs(s[i])]++;
		if(cnt[abs(s[i])]%2 == 0){
			// int x = i;
			while(i-1>=0 and abs(s[i-1]) != abs(s[i])){
				swap(s[i],s[i-1]);
				i--;
				ans++;
			}
			
			if(i-1>=0 and s[i]<s[i-1]){
				swap(s[i],s[i-1]);
				ans++;
			}
		}
	}
	// print(s);
	return ans;
}

// int main(){
	// cout<<count_swaps({-1,1,-1,1})<<endl;
// }

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