Submission #1040823

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040823		idas	Arranging Shoes (IOI19_shoes)	C++17	45 / 100	17 ms	2776 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
#define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
#define pb push_back

using namespace std;
typedef long long ll;
typedef vector<int> vi;

const int N=1e5+10;
int n;

long long count_swaps(vector<int> s) {
    n=s.size();
    vi pos;
    FOR(i, 0, n) if(s[i]<0) pos.pb(i);

    ll ans=0; int in=n-2;
    for(int i=n/2-1; i>=0; i--){
        ans+=abs(in-pos[i]);
        in-=2;
//        cout << pos[i] << " " << in << endl;
    }

    return ans;
}

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