Submission #603119

#	Time	Username	Problem	Language	Result	Execution time	Memory
603119		misteg168	Arranging Shoes (IOI19_shoes)	C++17	0 / 100	0 ms	212 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define F first
#define S second

long long count_swaps(std::vector<int> s) {
	ll n = s.size();
	map<ll, set<ll>> v;
	for(int i = 0; i < n; i++){
		v[-s[i]].insert(i);
	}
	vector<bool> pos(n, 0);
	ll ans = 0, curr = 0;
	for(int i = 0; i < n; i++){
		if(pos[i]){
			curr--;
			continue;
		}
		ans += *(v[s[i]].begin())-i-curr-1;
		if(s[i] < 0) ans++;
		curr++;
		pos[i] = 1;
		pos[ *(v[s[i]].begin()) ] = 1;
		//~ cerr << i << " " << *(v[s[i]].begin()) << " " << ans << " " << curr << "\n";
		v[ s[i] ].erase( v[ s[i] ].begin());
	}
	return ans;
}

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