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Create 4 July Subarrays With At Most K Distinct Integers #832

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Jul 4, 2025
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Create 4 July Subarrays With At Most K Distinct Integers #832

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17 changes: 17 additions & 0 deletions 4 July Subarrays With At Most K Distinct Integers
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Original file line number Diff line number Diff line change
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class Solution {
public:
int countAtMostK(vector<int> &arr, int k) {
unordered_map<int,int>mp;
int n = arr.size(), j = 0, ans = 0;
for (int i=0; i<n; i++){
mp[arr[i]]+=1;
while (j <= i && mp.size() > k){
mp[arr[j]]-=1;
if (mp[arr[j]] == 0) mp.erase(arr[j]);
j++;
}
ans += (i - j + 1);
}
return ans;
}
};
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