/*

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, ...

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.

*/

class Problem_2 {

public static void main(String[] args) {

int x = 0;

int y = 1;

int z;

int max = 4000000 ;

int sum = 0;

for (z = 0; z < max; z++) {

z = x + y;

x = y;

y = z;

if (z % 2 == 0) {sum += z;}

}

System.out.println(sum);

}

}