2918. Minimum Equal Sum of Two Arrays After Replacing Zeros

The problem involves finding the minimum equal sum of two arrays after replacing their zeros with positive integers. The solution calculates the sum of non-zero elements and the number of zeros in each array. It then determines the minimum possible sum for each array by adding the number of zeros to the sum of non-zero elements. If both arrays contain zeros, the minimum equal sum is the maximum of their minimum possible sums. If neither array has zeros, the solution checks if their sums are already equal. If only one array has zeros, it verifies if the sum of the other array is greater than or equal to the minimum possible sum of the array with zeros. The function returns -1 if an equal sum is impossible. The approach efficiently handles different scenarios to find the minimum equal sum. Test cases demonstrate its functionality. The solution uses a greedy approach to minimize the overall sum. The code is written in PHP and includes example usage.