제출 #1309061

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1309061		JuanJL	Arranging Shoes (IOI19_shoes)	C++20	25 / 100	146 ms	48844 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

#define fst first
#define snd second
#define pb push_back
#define forn(i,a,b) for(int i = a; i<b; i++)
#define SZ(x) (int)x.size()
#define ALL(x) x.begin(),x.end()
#define mset(a,v) memset(a,v,sizeof(a))
#define FIN ios::sync_with_stdio(0); cout.tie(); cin.tie(0);
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
template <typename L>
using iset = tree<L,null_type,less<L>,rb_tree_tag,tree_order_statistics_node_update>;

long long count_swaps(std::vector<int> s) {
	ll n = SZ(s);
	ll res = 0;

	vector<vector<ll>> cntp(3*n+5);
	vector<vector<ll>> cntn(3*n+5);
	forn(i,0,n){
		if(s[i]<0) cntn[s[i]*-1].pb(i);
		else cntp[s[i]].pb(i);
	}

	vector<bool> vis(3*n+5,0);
	iset<ll> ist; forn(i,0,n) ist.insert(i);
	forn(i,0,n)if(!vis[i]){
		vis[i]=true;
		ist.erase(i);
		//cout<<s[i]<<" con indice -> ";
		if(s[i]<0){
			ll j = lower_bound(ALL(cntp[s[i]*-1]),i)-cntp[s[i]*-1].begin();
			auto it = ist.lower_bound(cntp[s[i]*-1][j]);
			res+=ist.order_of_key(*it);
			//cout<<*it<<'\n';
			vis[*it]=true;
			ist.erase(it);
		}else{
			ll j = lower_bound(ALL(cntn[s[i]]),i)-cntp[s[i]].begin();
			auto it = ist.lower_bound(cntp[s[i]][j]);
			res+=1+ist.order_of_key(*it);
			//cout<<*it<<'\n';
			vis[*it]=true;
			ist.erase(it);
		}
	}
	return res;
}

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