Submission #240820

#	Time	Username	Problem	Language	Result	Execution time	Memory
240820		zoomswk	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	35 ms	1920 KiB

shoes

#include "shoes.h"
using namespace std;

long long count_swaps(std::vector<int> s) {
	int n = (int)s.size();
	if(n > 2000) return 0;
	long long res = 0;
	for(int i=0; i<n; i+=2){
		int loc = -1;
		for(int j=i+1; j<n; j++) if(s[j] == -s[i]){ loc = j; break; }
		while(loc > i+1){
			swap(s[loc], s[loc-1]);
			loc--;
			res++;
		}
		if(s[i] > 0) res++;
	}
	return res;
}

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