1897. Redistribute Characters to Make All Strings Equal

You are given an array of strings words (0-indexed).

In one operation, pick two distinct indices i and j, where words[i] is a non-empty string, and move any character from words[i] to any position in words[j].

Return true if you can make every string in words *equal using any number of operations, and false otherwise*.

class Solution {
public:
    bool makeEqual(vector<string>& words) {
        vector<int> freq(26);
        for(auto& w : words) for(auto& ch : w) freq[ch-'a'] += 1;
        for(auto& x : freq) {
            if(x % words.size()) return false;
        }
        return true;
    }
};