Open
Description
Background and motivation
Many lovers of C# like me used console class for programming competitions and faced to a problem like 'TimeLimit' or 'OutOfMemory' verdicts. It is related to very slowly reading from console because console reads whole line in RAM (like in Python), it is their main problem at all in programming compretitions.
I want to extend console class with 'read' methods (like 'cin' in C++), which will significantly optimize reading from the console and increase the popularity of using the language in competitions.
API Proposal
namespace System
{
public static class Console
{
public static string ReadToken(params char[] skipChars)
{
var hashSet = skipChars.ToHashSet();
var c = (char) In.Read();
while (hashSet.Contains(c))
{
c = (char) In.Read();
}
var sb = new StringBuilder();
while (!hashSet.Contains(c))
{
sb.Append(c);
c = (char) In.Read();
}
return sb.ToString();
}
public static string ReadToken() => ReadToken(' ', '\n', '\r');
public static bool ReadBool() => bool.Parse(ReadToken());
public static decimal ReadDecimal() => decimal.Parse(ReadToken());
public static double ReadDouble() => double.Parse(ReadToken());
public static float ReadFloat() => float.Parse(ReadToken());
public static int ReadInt() => int.Parse(ReadToken());
public static long ReadLong() => long.Parse(ReadToken());
}
}API Usage
var n = Console.ReadLong();
var arr = new int[n];
for (var i = 0; i < n; i++)
{
arr[i] = Console.ReadInt();
}Alternative Designs
No response
Risks
No response
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment