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  1. #include <iostream>
  2. using namespace std;
  3. #include <bits/stdc++.h>
  4. #include<vector>
  5.  
  6. int main() {
  7. 	// your code goes here
  8. 	vector<int>arr={1,2};
  9. 	int n=arr.size();
  10. 	int k=4;
  11. 	int count=0,sum=0,i=0,j=0;
  12.     int d=0;
  13.     unordered_map<int,int>mp;
  14.     while(i<n && j<n)
  15.      {
  16.      	mp[arr[j]]++;
  17.      	d=mp.size();
  18.      	while(d>k)
  19.      	 {
  20.      	 	mp[arr[i]]--;
  21.      	 	if(mp[arr[i]]==0)
  22.      	 	 {
  23.      	 	 	mp.erase(arr[i]);
  24.      	 	 }
  25.      	 	d=mp.size();
  26.      	 	i++;
  27.      	 }
  28.      	 count+=(j-i+1);
  29.      	 j++;
  30.      }
  31.      cout<<count;
  32.  
  33. 	return 0;
  34. }
Success #stdin #stdout 0s 5292KB
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https://ideone.com/fFGXHn
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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