Question

Given an equation "x=y", for example, "111 = 12", you need to add pluses inside x to make the equation correct. In our example "111=12", we can add one "11+1 = 12" and the equation becomes correct. You need to find the minimum number of pluses to add to x to make the equation correct. If there is no answer print - 1
how to approach these kind of problems?

Answer 1

Answer:

math books all problem

Explanation:

ok my friend