using System.Collections.Generic;
private Dictionary<string,Dictionary<string,int>> studentsMap;
public Session(Dictionary<string,Dictionary<string,float>> list){
public List<string> getAllNotPassed(){
return studentsMap.Where(x => x.Value.Any(y => y.Value == (int)mark.not_passed)).Select(x => x.Key).ToList();
public static void Main()
Session f = {"Пупкин",{"Матан",2}};
Console.WriteLine("Hello World");