题目描述 You are given three integers a a a , b b b and x x x . Your task is to construct a binary string s s s of length n=a+b n = a + b n=a+b such that there are exactly a a a zeroes, exactly b b b one

题目描述 You are given three integers aa , bb and xx . Your task is to construct a binary string ss of length n = a + bn=a+b such that there are exactly aa zeroes, exactly bb ones and exactly xx indices