Minimum Equal Sum of Two Arrays After Replacing Zeros

Given two arrays where each 0 can be replaced by any positive integer, find the smallest possible equal sum you can make their totals both reach (or return -1 if impossible). The core challenge is a numeric feasibility check using each array's current sum and count of zeros: you need an S ≥ max(sum1+zeros1, sum2+zeros2) (and if an array has no zeros its sum is fixed to S) — return the minimal such S or -1.