Submission #143498

#	Time	Username	Problem	Language	Result	Execution time	Memory
143498		muradeyn	Arranging Shoes (IOI19_shoes)	C++14	0 / 100	3 ms	504 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>

using namespace std;



long long count_swaps(vector<int> s) {
	long long ret = 0;
	int n = s.size();
	n *= 2;
	for (int i = 0;i<n;i+=2) {
        if (s[i] != -s[i + 1]) {
            int fn;
            for (int j = i + 2;j < n;j++) {
                if (s[j] == -s[i + 1]) {
                    fn = j;
                    break;
                }
            }
            while (fn != i + 1) {
                ret++;
                swap(s[fn] , s[fn - 1]);
                fn--;
            }
        }
        if (s[i] > s[i + 1]) {
            ret++;
            swap(s[i] , s[i + 1]);
        }
	}
	return ret;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:14:17: warning: 'fn' may be used uninitialized in this function [-Wmaybe-uninitialized]
             int fn;
                 ^~

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