Count Substrings With K-Frequency Characters I || LeetCode Weekly Contest 420 || Leetcode Solution

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Count Substrings With K-Frequency Characters I || LeetCode Weekly Contest 420 || Leetcode Solution

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class Solution {
public:
int numberOfSubstrings(string s, int k) {
int n = s.size();
int ans = 0;
for (int i = 0; i < n; i++) {
vector<int> freq(26, 0);
for (int j = i; j < n; j++) {
freq[s[j] - 'a']++;
if (any_of(freq.begin(), freq.end(), [&](int f){ return f >= k; })) {
ans++;
}
}
}
return ans;
}
};

neettarget
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Bruh explain me this.. we have to write the algorithm

dhanushm