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sakapon/D.cs

Created December 15, 2019 08:40
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sumitrust2019 D - Lucky PIN (1)
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D.cs
using System;
using System.Linq;
class D
{
static void Main()
{
Console.ReadLine();
var s = Console.ReadLine();
int i;
Console.WriteLine(Enumerable.Range(0, 1000).Select(x => $"{x:D3}").Count(p => (i = s.IndexOf(p[0])) > -1 && (i = s.IndexOf(p[1], i + 1)) > -1 && s.IndexOf(p[2], i + 1) > -1));
}
}
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