I can't figure out why I'm reading wrong input in reading array elements in codechef probl-CodePudding

I'm getting different user input instead of getting real inputs given by user in codechef

User Input:

4

1 2 3 4

Expected Output: 4 3 2 1

using System;

public class Test
{
    public static void Main()
    {
        
        

    int N = Convert.ToInt32(Console.ReadLine());
        

    int[] arr = new int[N];
        

    for(int i=0;i<N;i  ){
               arr[i] =  Convert.ToInt32(Console.Read());
            }
        
            for(int j=N-1;j>=0;j--){
                Console.Write(arr[j]);
                Console.Write(" ");
        }
    }
}

Output I got: 32 50 32 49

CodePudding user response：

Since you said you want to do it without ReadLine, let's work with your current code. There are two issues at hand.

You should skip the spaces
You get the character codes instead of the values

To skip the spaces, you can simply read them and do nothing with the read character. I implemented this below in a way that assumes after every number (one digit long) there will be a single space to ignore. But you could also do that in a less hacky way by checking what the read character actually is before you discard it.

To get the character code into the value, I first perform a conversion into a char by casting it. Then I get the numeric value, which might be a double. But because you know that your numbers are integers, we can cast that to int.

using System;
class Program {
    static void Main(string[] args) {
        int N = Convert.ToInt32(Console.ReadLine());
        int[] arr = new int[N];
        
        for(int i=0;i<N;i  ){
            arr[i] = (int)Char.GetNumericValue((char)Console.Read());
            Console.Read();
        }
        
        for(int j=N-1;j>=0;j--){
                Console.Write(arr[j]);
                Console.Write(" ");
        }
    }
}