Problem:
Given two arrays, A and B, of non-negative int scores. A "special" score is one which is a multiple of 10, such as 40 or 90. Return the sum of largest special score in A and the largest special score in B. To practice decomposition, write a separate helper method which finds the largest special score in an array. Write your helper method after your scoresSpecial() method in the JavaBat text area.
scoresSpecial({12, 10, 4}, {2, 20, 30}) → 40
scoresSpecial({20, 10, 4}, {2, 20, 10}) → 40
scoresSpecial({12, 11, 4}, {2, 20, 31}) → 20
Solution:
public int scoresSpecial(int[] a, int[] b) {
int spec1 = helper(a);
int spec2 = helper(b);
return spec1 + spec2;
}
public int helper(int[] a) {
int tmp = 0;
for (int i = 0; i < a.length; i++) {
if (a[i] % 10 == 0 && a[i] > tmp)
tmp = a[i];
}
return tmp;
}
public int scoresSpecial(int[] a, int[] b) {
ReplyDeleteint sum = 0;
int max = 0;
int max1 = 0;
for (int i = 0; i < a.length; i++) {
if (a[i] > max && a[i] % 10 == 0) {
max = a[i];
}
}
for (int j = 0; j < b.length; j++) {
if (b[j] > max1 && b[j] % 10 == 0) {
max1 = b[j];
}
}
sum = max + max1;
return sum;
}
public int scoresSpecial(int[] a, int[] b) {
ReplyDeletereturn max(a) + max(b);
}
private int max(int[] n) {
int high = 0;
for (int i = 0; i < n.length; i++) {
if (n[i] > high && n[i] % 10 == 0) {
high = n[i];
}
}
return high;
}
public int scoresSpecial(int[] a, int[] b) {
ReplyDeletereturn scoreHelper(a) + scoreHelper(b);
}
public int scoreHelper(int[] array)
{
int max = 0;
for (int score: array)
{
if (score % 10 == 0 && score > max)
{
max = score;
}
}
return max;
}
Very nice solution
DeleteWith lambda:
ReplyDeletepublic int scoresSpecial(int[] a, int[] b) {
return largest(a) + largest(b);
}
public int largest(int[] nums) {
return Arrays.stream(nums)
.filter(n -> n % 10 == 0)
.reduce(Integer::max).orElse(0);
}
Another way with Java Stream
ReplyDeletepublic int scoresSpecial(int[] a, int[] b) {
return biggest(a) + biggest(b);
}
private int biggest(int[] arr) {
return Arrays.stream(arr).filter(i -> i % 10 == 0).max().orElse(0);
}
or straight without a method.
public static int scoresSpecial(int[] a, int[] b) {
int firstArr = Arrays.stream(a).filter(i -> i % 10 == 0).max().orElse(0);
int secondArr = Arrays.stream(b).filter(i -> i % 10 == 0).max().orElse(0);
return Integer.sum(firstArr, secondArr);
}