Submission #1236367

#	Time	Username	Problem	Language	Result	Execution time	Memory
1236367		mariza	Arranging Shoes (IOI19_shoes)	C++20	45 / 100	15 ms	1864 KiB

shoes

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

typedef long long ll;

long long count_swaps(vector<int> s){
    ll n=s.size()/2;

    ll nxtl=0, nxtr=1, ans=0;
    for(ll i=0; i<2*n; i++){
        if(s[i]<0){
            ans+=max(0ll,nxtl-i);
            nxtl+=2;
        }
        else{
            ans+=max(0ll,nxtr-i);
            nxtr+=2;
        }
    }
    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