Submission #1311179

#	Time	Username	Problem	Language	Result	Execution time	Memory
1311179		takoshanava	Arranging Shoes (IOI19_shoes)	C++20	0 / 100	1 ms	336 KiB

shoes

#include <bits/stdc++.h>
#define pb push_back
#define fs first
#define sc second
using namespace std;

int count_swaps(vector<int> a){
    int n = a.size();
    map<int, set<int>> mp;
    for(int i = 0; i < n; i++){
        mp[a[i]].insert(i);
    }
    int ans = 0;
    for(int i = 0; i < n; i++){
        if(a[i] > 0) ans += i - *mp[-a[i]].begin();
        else ans += i - *mp[-a[i]].begin() - 1;
        mp[-a[i]].erase(mp[-a[i]].begin());
    }
    return ans;
}

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