Submission #670613

#	Time	Username	Problem	Language	Result	Execution time	Memory
670613		birthdaycake	Arranging Shoes (IOI19_shoes)	C++17	10 / 100	1 ms	212 KiB

shoes

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

int vs[2001];
long long count_swaps(vector<int>s) {
    long long n = s.size(),ans = 0;
    map<int,set<int>>d;
    for(int i = 0; i < n; i++){
        int f = -1;
        if(d[-s[i]].size()){
            f = *d[-s[i]].begin();
            d[-s[i]].erase(f);
        }
        if(f != -1){
            int j = i;
            while(j != f + 1){
                swap(vs[j], vs[j - 1]);
                swap(s[j], s[j - 1]);
                j--;
                ans++;
            }
            if(s[f] > 0) {
                swap(s[f], s[f + 1]);
                ans++;
            }
            vs[f] = vs[f + 1] = 1;
        }else{
            d[s[i]].insert(i);
        }
        
    }
    
    return ans;
}

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