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package ProjectEuler;
/**
* 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:
* <p>
* 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
* <p>
* By considering the terms in the Fibonacci sequence whose values do not exceed four million,
* 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:
*
* <p>1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
*
* <p>By considering the terms in the Fibonacci sequence whose values do not exceed four million,
* find the sum of the even-valued terms.
* <p>
* Link: https://projecteuler.net/problem=2
*
* <p>Link: https://projecteuler.net/problem=2
*/
public class Problem02 {
public static void main(String[] args) {
int[][] testNumbers = {
{10, 10}, /* 2 + 8 == 10 */
{15, 10}, /* 2 + 8 == 10 */
{2, 2},
{1, 0},
{89, 44} /* 2 + 8 + 34 == 44 */
};
public static void main(String[] args) {
int[][] testNumbers = {
{10, 10}, /* 2 + 8 == 10 */
{15, 10}, /* 2 + 8 == 10 */
{2, 2},
{1, 0},
{89, 44} /* 2 + 8 + 34 == 44 */
};
for (int[] ints : testNumbers) {
assert solution1(ints[0]) == ints[1];
}
for (int[] ints : testNumbers) {
assert solution1(ints[0]) == ints[1];
}
}
private static int solution1(int n) {
int sum = 0;
int first = 1;
int second = 2;
while (second <= n) {
if (second % 2 == 0) {
sum += second;
}
int temp = first + second;
first = second;
second = temp;
}
return sum;
private static int solution1(int n) {
int sum = 0;
int first = 1;
int second = 2;
while (second <= n) {
if (second % 2 == 0) {
sum += second;
}
int temp = first + second;
first = second;
second = temp;
}
}
return sum;
}
}