Submission #294651

#	Time	Username	Problem	Language	Result	Execution time	Memory
294651		mode149256	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1094 ms	3072 KiB

shoes

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

using ll = long long;
using vi = vector<int>;
using vl = vector<ll>;

ll count_swaps(vi s) {
	ll ats = 0;
	int N = (int)s.size();
	for (int i = 0; i < N; ++i)
	{
		// if (s[i] > 0) {
		// 	int nx = i + 1;
		// 	while (s[nx] > 0) nx++;
		// 	int val = s[nx];
		// 	s.erase(s.begin() + nx);
		// 	s.insert(s.begin() + i, val);
		// 	ats += nx - i;
		// }

		// s[i] < 0
		int nx = i + 1;
		while (s[nx] + s[i] != 0) nx++;

		ats += nx - (i + 1);
		s.erase(s.begin() + nx);
		s.insert(s.begin() + i + 1, -s[i]);
		if (s[i] > s[i + 1]) ats++;
		i++;
	}
	return ats;
}

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