Submission #378482

#	Time	Username	Problem	Language	Result	Execution time	Memory
378482		autumn_eel	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1073 ms	3308 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<int(n);i++)
using namespace std;
typedef long long ll;

long long count_swaps(std::vector<int> s) {
	ll ans=0;
	for(int i=0;i<(int)s.size();i+=2){
		int idx=-1;
		for(int j=i+1;j<(int)s.size();j++){
			if(s[j]==-s[i]){idx=j;break;}
		}
		while(idx!=i+1){
			swap(s[idx-1],s[idx]);
			idx--;
			ans++;
		}
		if(s[i]>0){
			swap(s[i],s[i+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