A city has several different tax schemes. In each scheme, the taxpayer pays a percentage of his income plus a fixed base amount every year. Each citizen is free to choose an optimal tax scheme for his income after the end of each year.
You will be given two ints, fixedBase and percent (elements with equal indices describe the same tax scheme).
Given an index of a tax scheme, return the minimal non-negative income this scheme is optimal for (choosing any other tax scheme results in a tax which is strictly greater). If this scheme is not optimal for any income, return -1.