Submission #301862

#	Time	Username	Problem	Language	Result	Execution time	Memory
301862		NicolaAbusaad2014	Arranging Shoes (IOI19_shoes)	C++14	0 / 100	1 ms	384 KiB

shoes

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

long long count_swaps(std::vector<int> s) {
    map<long,vector<long> >m;
    map<long,long>now;
    map<long,bool>ok;
    long n=s.size();
    long long arr[2*n]={},x,z,ans=0;
    for(long i=0;i<2*n;i++){
    m[s[i]].push_back(i);
    }
    for(long i=0;i<2*n;i++){
    if(ok[abs(s[i])]){
    ok[abs(s[i])]=false;
    }
    else{
    ok[abs(s[i])]=true;
    z=now[abs(s[i])];
    x=m[-s[i]][z];
    now[abs(s[i])]++;
    for(long j=x+1;j<2*n;j++){
    arr[j]--;
    }
    ans+=x-i-1+arr[x];
    if(s[i]>0){
    ans++;
    }
    }
    }
    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