using System;
using System.Linq;
namespace laba3 {
class Program {
static void Main(string[] args) {
var n = int.Parse(Console.ReadLine());
var arr = Enumerable.Repeat(0, n)
.Select(x => int.Parse(Console.ReadLine())).ToArray();
var min3 = arr.Where(x => x > 0).OrderBy(x => x).Take(3).ToList();
foreach (var min in min3) {
Console.WriteLine(min);
}
}
}
}
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