Submission #301749

#	Time	Username	Problem	Language	Result	Execution time	Memory
301749		letandat	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1049 ms	2168 KiB

shoes

#include<bits/stdc++.h>
using namespace std;
//3
//-2 2 2 -2 -2 2
int64_t count_swaps(vector <int> a) {
	int n = a.size()/2;
	int ans = 0;
	
	for (int i=0; i<2*n-1; i+=2) {
		if (abs(a[i])==abs(a[i+1])) continue;
		for (int j=i+2; j<2*n; j++) {
			if (abs(a[j]) == abs(a[i])) {
				ans += j-i-1;
				for (int k=j; k>=i+2; k--) {
					a[k] = a[k-1];
				}
				a[i+1] = a[i];
			}
		}
	}
	for (int i=0; i<2*n-1; i+=2) {
		if (a[i] > 0) ans += 1;
	}
	return ans;
}
void test () {
	int n; cin >> n;
	vector<int> a;
	for (int i=0; i<2*n; i++) {
		int c; cin >> c;
		a.push_back(c);
	}
	cout << count_swaps(a);
}

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