Submission #468816

#	Time	Username	Problem	Language	Result	Execution time	Memory
468816		PiejanVDC	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1093 ms	1856 KiB

shoes

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

long long count_swaps(vector<int>v) {
	int fixed = -1, n = v.size();
	long long ans = 0;
	while(fixed < n-1) {
		int fix = -v[fixed+1];
		int pos = fixed+2;
		while(pos < n && v[pos] != fix) pos++;
		for(int i = pos-1 ; i > fixed+1 ; i--) ans++,swap(v[i],v[i+1]);
		if(fix < 0) {
			ans++;
			swap(v[fixed+1],v[fixed+2]);
		}
		fixed+=2;
	}
	return ans;
}

/*
signed main() {
	int n; cin>>n;
	vector<int>v(n);
	for(auto &z : v)
		cin >> z;
	cout << count_swaps(v);
}
*/

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