/*
Esercizio n° 02;
Funzionamento:
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
Find the sum of all the even-valued terms in the sequence which do not exceed four million.
*/
using System;
class NomeProgramma
{
static void Main()
{
int limite = 4000000;
int sommadispari = 1;
int somma = 0;
int x = 1;
int y = 2;
int appo;
while (y < limite)
{
if (y < limite)
{
somma += x + y;
if (somma % 2 == 0)
{
sommadispari += somma;
}
appo = y;
y = somma;
x = appo;
}
}
Console.Write("Somma = {0}", sommadispari);
}
}