Keyboard input a number of the worker's wage income (end with a negative number), output per worker wage income, and output of every worker pay tax calculated, statistics and output and the total amount of the total number of employees,

[tax calculation problem, according to the national tax policy, personal taxable threshold for the monthly income of 3500 yuan; shall not exceed the threshold of 1500 yuan (namely the monthly income of more than 3500 yuan, 5000 yuan but not more than), more than 3% pay personal income tax; more than a threshold of $1500 to $4500, more than part of the 10% pay personal income tax; taxable income over the threshold of 4500 to 9000 yuan, more than part of the 20% pay personal income tax]