/*

 * 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.

 */


public class Problem2 {


int a = 1;

int b = 2;

int c;

int sum = 0;


void solve() {

while (c < 4000000) {

if (c % 2 == 0) {

sum += c;

}

c = a + b;

a = b;

b = c;


}

System.out.println(sum + 2);

}


public static void main(String[] args) {

new Problem2().solve();

}

}