Submission #881376

#	Time	Username	Problem	Language	Result	Execution time	Memory
881376		theghostking	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	1 ms	348 KiB

shoes

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

long long count_swaps(vector<int> s) {
	long long sz = s.size();
	vector<bool> vis(sz);
	map<long long,queue<long long>> mp;
	for (long long i = 0; i<sz; i++){
		mp[s[i]].push(i);
	}
	long long ans = 0;
	for (long long i = 0; i<sz; i++){
		if (vis[i]) continue;
		mp[s[i]].pop();
		long long rev = -s[i];
		long long v = mp[rev].front();
		vis[v] = true;
		mp[rev].pop();
		ans += v-i-(s[i]<0);
	}
	return ans;
}

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