Submission #737091

#	Time	Username	Problem	Language	Result	Execution time	Memory
737091		ammar2000	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1091 ms	29884 KiB

shoes

#include "shoes.h"
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define F first
#define S second
#define coy cout<<"YES\n"
#define con cout<<"NO\n"
#define co1 cout<<"-1\n"
#define sc(x) scanf("%lld",&x)
#define all(x) x.begin(),x.end()
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
const int SI=3e5+7;
ll INF=8e18+7;
int MOD=1e9+7;
ll n,a[SI],re[SI],vis[SI];
map <ll,ll> la,lai,lan;
long long count_swaps(std::vector<int> s) {
    n=s.size()/2;
    for (int i=n*2-1;i>=0;i--)
    {
        if (la[s[i]])
            lai[i]=la[s[i]];
        if (la[-s[i]])
            lan[i]=la[-s[i]];
        la[s[i]]=i;
    }
    ll ans=0;
    for(int i=0;i<2*n;i++)
    {
        if (vis[i])
            continue;
        if (s[i]>0)
        {
            int u=lan[i];
            while (vis[u])
                u=lai[u];
            ans+=u-i;
            vis[u]=1;
            ans-=re[u]-re[i];
            for(int o=u+1;o<2*n;o++)
                re[o]++;
        }
        else
        {
            int u=lan[i];
            while (vis[u])
                u=lai[u];
            ans+=u-i-1;
            ans-=re[u]-re[i];
            vis[u]=1;
            for(int o=u+1;o<2*n;o++)
                re[o]++;
        }
    }
    return ans;
}

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