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import Foundation

// MARK: Standard Input

/// Reads a line from standard input and returns a string form stdin
public func getLine() -> String {
	var buf = String() //will accumulate the result string
	var c = getchar() //used to read the next character. getchar is a c function that returns ASCII of Int32
	
	while c != EOF && c != 10 { //loop until reach end of file or newline. 10 is ascii code for newline
		buf.append(UnicodeScalar(UInt32(c))) //since String is a collecton of unicode scalars
		c = getchar()
	}
	return buf
}

/// this is an alias for getLine
public func readLn() -> String {
	return getLine()
}

/// Read line from standard input and convert to integer
///:returns: integer value
public func readLn() -> Int {
	return Int(getLine())!
}

/// Read line and convert to array of strings (words)
///:returns: array of strings
public func readLn() -> [String] {
	return getLine().componentsSeparatedByCharactersInSet(NSCharacterSet.whitespaceCharacterSet())
}

/// Read line and convert to array of integers
///:returns: array of integers
public func readLn() -> [Int] {
	let words: [String] = readLn()
	return words.map { Int($0)! }
}

//solve-me-first
/*
let a: Int = readLn()   // calls readLn() -> Int, because a is of Int type
let b: Int = readLn()
print(a + b)
*/

/*
//Create a txt file "solve-me-first-tc0.txt" and put in the following values for example: 
2
3

//Then, on the command line use something like...
cat HackerRank/solve-me-first-tc0.txt | swift MyPlayground.playground/Contents.swift

*/