Submission #185301

#	Time	Username	Problem	Language	Result	Execution time	Memory
185301		RiscadoA	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	3 ms	504 KiB

shoes

#include "shoes.h"

long long count_swaps(std::vector<int> s) {
	int c = 0;
	
	for (int i = 0; i < s.size() - 1; ++i) {
		int j = i + 1;
		
		for (; j < s.size(); ++j) {
			if (s[j] == -s[i]) {
					break;
			}
		}
		
		s.erase(s.begin() + j);
		
		if (s[i] < 0) {
			c += j - i - 1;
			s.insert(s.begin() + i + 1, -s[i]);
		} else {
			c += j - i;
			s.insert(s.begin() + i, -s[i]);
		}
	}
	
	return c;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:6:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < s.size() - 1; ++i) {
                  ~~^~~~~~~~~~~~~~
shoes.cpp:9:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (; j < s.size(); ++j) {
          ~~^~~~~~~~~~

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