Submission #297886

#	Time	Username	Problem	Language	Result	Execution time	Memory
297886		erd1	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1 ms	288 KiB

shoes

#include "shoes.h"
#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
#define all(x) (x).begin(), (x).end()
typedef int64_t lld;
typedef pair<int, int> pii;

#include<bits/extc++.h>
using namespace __gnu_pbds;
template<typename T>
using OST = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;


map<int, int> cnt;

bool operator<(pii a, pii b){
	if(abs(a.ff) != abs(b.ff))return abs(a.ff) < abs(b.ff);
	if(a.ss != b.ss)return a.ss < b.ss;
	return a.ff < b.ff;
}

OST<pii> ost;

long long count_swaps(vector<int> s) {
	lld ans = 0;
	for(auto i: s)ans += ost.size()-ost.order_of_key({i, cnt[i]}), ost.insert({i, cnt[i]++});
	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