Remove last character from C# string
ans = ans.Remove(ans.Length - 1);
Using SortedDictionary in C#
In C++ we have map. In C# the equivalent of map is Dictionary. However it's not sorted. So we use SortedDictionary instead. Following is an example of mapping. using System; using System.Collections.Generic; namespace PracticeApp { class Program { static void Main(string[] args) { var s = Console.ReadLine()?.Split('+'); var myDictionary = new SortedDictionary<int, int>(); foreach (var item in s) { int a = int.Parse(item); myDictionary.TryGetValue(a, out var x); myDictionary[a] = x + 1; } foreach (var item in myDictionary) { Console.WriteLine(item.Key+" "+item.Value); } } } } Sample input: 3+2+1+1+2+2+3 Sample output: 1 2 2 3 3 2
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