using System;
class Program
{
static int getTheSecondLowestDigit(int n) {
int min = int.MaxValue, befor_min = int.MaxValue;
while(n != 0) {
int x = n % 10;
if (x < min) {
befor_min = min;
min = x;
} else if (x < befor_min && x != min) {
befor_min = x;
}
n /= 10;
}
return befor_min;
}
static void Main() {
int n = 8647293;
Console.WriteLine(getTheSecondLowestDigit(n));
n = 213;
Console.WriteLine(getTheSecondLowestDigit(n));
n = 76400;
Console.WriteLine(getTheSecondLowestDigit(n));
n = 111;
if (getTheSecondLowestDigit(n) == int.MaxValue)
Console.WriteLine("There is no second lowest number");
}
}
/*
run:
3
2
4
There is no second lowest number
*/
