CCF 201612-2 工资计算 100分

 通过遍历100000内的税前工资来顺推得到税后工资。

#include<bits/stdc++.h>
using namespace std;

int main() {
	int salary,money;
	cin>>salary;
	if(salary <= 3500) {
		cout<<salary<<endl;
		return 0;
	}
	for(money = 3600; money <= 100000; money=money+100) {
		int x = 0;  //扣税
		if(money >= 3600 && money <= 5000) {
			x += (money-3500)*0.03;
		}
		if(money >= 5100 && money <= 8000) {
			x += (money-5000)*0.1+45;
		}
		if(money >= 8100 && money <= 12500) {
			x += (money-8000)*0.2+45+300;
		}
		if(money >=12600 && money <= 38500) {
			x += (money-12500)*0.25+45+300+900;
		}
		if(money >= 38600 && money <= 58500) {
			x += (money-38500)*0.3+45+300+900+6500;
		}
		if(money >= 58600 && money <= 83500) {
			x += (money-58500)*0.35+45+300+900+6500+6000;
		}
		if(money >= 83600) {
			x += (money-83500)*0.45+45+300+900+6500+6000+8750;
		}
		if(money-x == salary) {
			cout<<money<<endl;
			break;
		}
	}

	return 0;
}