Subarray with distinct element(what mistake have i done?)

#1

#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,i,j;
cin>>n;
unordered_sets;
int a[n+1];
for(i=0;i<n;i++)
cin>>a[i];
i=0,j=0;
int sum=0;
while(i<n)
{
int k1=1;
s.insert(a[i]);
j=i+1;
while(s.find(a[j])==s.end() && j<n)
{
k1=k1+1;
j=j+1;
}
s.erase(a[i]);
sum=(sum+((j-i)*(j-i+1))/2)%1000000007;
i=i+1;
}
cout<<sum<<endl;
}

#3

Please try to dry run your code with sample input:
3
1 2 3

And then with sample input :
3
1 2 3 3

Answers are 10 and 11 respectively but your code give 10 and 10.
You will find your mistake :slight_smile:

Please have a look at this sample code if you still are unable to decode yourself. .

#4

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