有数量无限的红(Red)绿(Green)蓝(Blue)三种彩球排成一行，每组先为5个红色球，随后3个绿色，最后为2个蓝色。每个球都有编号，从左到右依次为1,2,3……。输入整数代表编号，求该编号球的颜色。下面是实现的C++代码片段：

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";