Interface With Ambiguity Problem, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    interface Iinterface1
    {
        int Show(int a, int b);
    }
    interface Iinterface2
    {
        int Show(int a, int b);
    }
    
    public class Class: Iinterface1,Iinterface2
    {
       int Iinterface1.Show(int a, int b)   
       {
           Console.WriteLine(a+b);
           return a+b;
       }
        int Iinterface2.Show(int a, int b)
        {
           Console.WriteLine(a*b);   
            return a*b;
        }
    }
    
    public class Program
    {
        public static void Main(string[] args)
        {
            //Your code goes here
            Console.WriteLine("Hello, world!");
            Class c=new Class();
            Iinterface1 i1=c;  Iinterface2 i2=c;
            i1.Show(50,30);
            i2.Show(20,5);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,09 sec, cpu time: 0,08 sec, average memory usage: 17 Mb, average nr of threads: 3, absolute service time: 0,27 sec