Submission #347989

#	Time	Username	Problem	Language	Result	Execution time	Memory
347989		Chaska	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1092 ms	1944 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
int n;
long long count_swaps(vector<int> s) {
    n = s.size()/2;
    long long k=0;
    for (int i=n+n-1;i>=1;i-=2) {
        int  p = s[i];
        int q = p *-1;
        int w = i-1;
        while (s[w]!=q) w--;
         while (w<i) {
             swap(s[w],s[w+1]);
             k++;
             w++;
         }
         if (s[i]<0) k--;
    }
    return k;
}

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