Submission #677072

#	Time	Username	Problem	Language	Result	Execution time	Memory
677072		penguin133	Arranging Shoes (IOI19_shoes)	C++17	45 / 100	79 ms	11496 KiB

shoes

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

//#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif

set<int> L, R;

long long count_swaps(std::vector<int> s) {
	int n = (int)s.size();
	for(int i=0;i<(int)s.size();i++){
		if(s[i] < 0)L.insert(i);
		else R.insert(i);
	}
	
	long long ans = 0;
	
	for(int i=0;i<n;i++){
		if(i%2){
			ans += max(0, *(R.begin()) - i);
			R.erase(R.begin());
		}
		else{
			ans += max(0, *(L.begin()) - i);
			L.erase(L.begin());
		}
	}
	
	return ans;
}

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