Submission #63782532

Source Code Expand

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#include <bits/stdc++.h>
using namespace std;
const int N=3e5+2;
int n,ans,a[N],b[N],c[N],d[N],e[N];
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)   cin>>a[i];
    for(int i=1;i<=n;i++)
    {
        d[i]=d[i-1];
        if(!b[a[i]])    d[i]++;
        b[a[i]]=1;
    }
    for(int i=n;i>=1;i--)
    {
        e[i]=e[i+1];
        if(!c[a[i]])    e[i]++;
        c[a[i]]=1;
    }
    for(int i=1;i<n;i++)    ans=max(ans,d[i]+e[i+1]);
 
 
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#include <bits/stdc++.h>
using namespace std;
const int N=3e5+2;
int n,ans,a[N],b[N],c[N],d[N],e[N];
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)   cin>>a[i];
    for(int i=1;i<=n;i++)
    {
        d[i]=d[i-1];
        if(!b[a[i]])    d[i]++;
        b[a[i]]=1;
    }
    for(int i=n;i>=1;i--)
    {
        e[i]=e[i+1];
        if(!c[a[i]])    e[i]++;
        c[a[i]]=1;
    }
    for(int i=1;i<n;i++)    ans=max(ans,d[i]+e[i+1]);
    cout<<ans;
    return 0;
}

Submission Info

Judge Result