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- using System;
- using System.Collections.Generic;
- using System.Text;
- namespace DP
- {
- class MainClass
- {
- public static void Main(string[] args)
- {
- Console.WriteLine("Hello World!");
- //Урал делал:
- //FiboNumbers(Convert.ToInt32(Console.ReadLine()));
- //IsNumberFibo(Convert.ToInt32(Console.ReadLine()));
- //-----------
- //Райнур делал
- ////5ая задача Снова Фибоначчи
- //var number = Convert.ToInt32(Console.ReadLine());
- //Console.WriteLine(FibonachiLastNumber(number));
- ////4ая задача Слово
- //var str = Console.ReadLine();
- //Console.WriteLine(FibonachiWord(str));
- }
- //3 и 5 задача
- public static int FibonachiLastNumber(int count)
- {
- if (count < 0) return -1;
- //1 1 2 3 5
- var a = 1;
- var b = 1;
- var c = 1;
- for (int i = 2; i <= count; i++)
- {
- c = a + b;
- a = b;
- b = c;
- }
- return c;
- }
- //задача 4 Слово
- public static string FibonachiWord(string str)
- {
- var count = str.Length;
- StringBuilder sb = new StringBuilder();
- //1 1 2 3 5
- var a = 0;
- var b = 1;
- var c = 1;
- var listOfFibonachi = new List<int>();
- for (int i = 1; i <= count; i++)
- {
- c = a + b;
- a = b;
- b = c;
- if (c > count) break;
- listOfFibonachi.Add(c);
- }
- foreach (var index in listOfFibonachi)
- {
- sb.Append(str[index-1]);
- }
- return sb.ToString();
- }
- //числа фибоначи
- public static void FiboNumbers(int index)
- {
- if (index == 0)
- {
- Console.WriteLine(0);
- }
- if (index <= 2)
- {
- Console.WriteLine(1);
- }
- if (index > 2)
- {
- List<int> listOfFiboNumbers = new List<int>();
- listOfFiboNumbers.Add(1);
- listOfFiboNumbers.Add(1);
- for (int i = 2; i < index; i++)
- {
- listOfFiboNumbers.Add(listOfFiboNumbers[i - 2] + listOfFiboNumbers[i - 1]);
- }
- Console.WriteLine(listOfFiboNumbers[index - 1]);
- }
- }
- //Числа Фибоначчи - 2
- public static void IsNumberFibo(int number)
- {
- int lastNumber = 0;
- int place = 0;
- int a = 0, b = 1;
- while (lastNumber < number)
- {
- a = b;
- b = lastNumber;
- lastNumber = a + b;
- place++;
- }
- if (lastNumber == number)
- {
- Console.WriteLine(1);
- Console.WriteLine(place);
- }
- else Console.WriteLine(0);
- }
- //3 и 4 задача
- public static void LastFiboNumber(int index)
- {
- if (index <= 1)
- {
- Console.WriteLine(1);
- }
- if (index > 2)
- {
- List<int> listOfFiboNumbers = new List<int>();
- string lastNumber;
- listOfFiboNumbers.Add(1);
- listOfFiboNumbers.Add(1);
- for (int i = 2; i < index; i++)
- {
- listOfFiboNumbers.Add(listOfFiboNumbers[i - 2] + listOfFiboNumbers[i - 1]);
- }
- lastNumber = listOfFiboNumbers[index - 1].ToString();
- Console.WriteLine(lastNumber[lastNumber.Length - 1]);
- }
- }
- }
- }
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