Submission #722867

#	Time	Username	Problem	Language	Result	Execution time	Memory
722867		GrandTiger1729	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1095 ms	2652 KiB

shoes

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

long long count_swaps(vector<int> s){
	auto a = s;
    int N = a.size(), n = N / 2;
    long long cnt = 0;
    for (int i = 0; i < N; i += 2){
        int j = i;
        j = i + 1;
        while (j < N && a[j] != -a[i]) j++;
        while (j > i + 1){
            swap(a[j], a[j - 1]);
            j--;
            cnt++;
        }
        if (a[i] > 0){
            swap(a[i], a[i + 1]);
            cnt++;
        }
    }
    return cnt;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:7:23: warning: unused variable 'n' [-Wunused-variable]
    7 |     int N = a.size(), n = N / 2;
      |                       ^

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