Submission #1047245

#	Time	Username	Problem	Language	Result	Execution time	Memory
1047245		vjudge1	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1098 ms	3284 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
long long count_swaps(std::vector<int> s) {
	int n= s.size();
	int ans=0;
	for(int i = 0;i<n;i+=2) {
		int idx=-1;
		for(int j = i+1;j<n;j++) {
			if(s[j] == -s[i]){
				idx=j;
				break;
			}
		}
		if(idx==-1)continue;
		while(idx > i+1) {
			swap(s[idx], s[idx-1]);
			ans++;
			idx--;
		}
		if(s[i] > 0){
			swap(s[idx], s[idx-1]);
			ans++;
		}
	}
	return ans;
}

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