using System;
using System.Collections.Generic;
using System.Linq;
namespace _17.Altitude
{
class Program
{
static void Main(string[] args)
{
string[] altitudeArray = Console.ReadLine().Split(' ').ToArray();
long altitude = Convert.ToInt64(altitudeArray[0]);
for (int cnt = 0; cnt < altitudeArray.Length; cnt++)
{
if (altitudeArray[cnt] == "up")
{
altitude += Convert.ToInt64(altitudeArray[cnt + 1]);
}
if (altitudeArray[cnt] == "down")
{
altitude -= Convert.ToInt64(altitudeArray[cnt + 1]);
}
if (altitude <= 0)
{
Console.WriteLine("crashed");
return;
}
}
Console.WriteLine($"got through safely. current altitude: {altitude}m");
}
}
}
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