有数量无限的红(Red)、绿(Green)、蓝(Blue)三种彩球排成一行，每组排列顺序为5个红色球、3个绿色球、2个蓝色球。球从左到右编号依次为1,2,3……。输入整数代表球的编号，求该编号对应球的颜色。以下是实现该功能的C++代码：

int N, remainder;
cin >> N;
remainder = N % 10; // remainder变量保存余数

if((1 <= remainder) && (remainder <= 5))
    cout << "Red";
else if ((6 <= remainder) && (remainder <= 8))
    cout << "Green";
else if ((remainder == 9) || (remainder == 0))
    cout << "Blue";