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Use the Java Standard Library: Don't reinvent the wheel. Know your way around Java Platform SE 8 or higher, especially the Collections API.
"Your code passed the test cases," Sarah continued, "but we’re looking for optimization. The brute force is $O(n^2)$. Can you improve it?"
public static int removeDuplicates(int[] a)
if (a.length==0) return 0;
int write = 1;
for (int read=1; read<a.length; read++)
if (a[read] != a[read-1]) a[write++] = a[read];Ready to create a quiz? Use Canvas to test your knowledge with a custom quiz Get started
Use the Java Standard Library: Don't reinvent the wheel. Know your way around Java Platform SE 8 or higher, especially the Collections API.
"Your code passed the test cases," Sarah continued, "but we’re looking for optimization. The brute force is $O(n^2)$. Can you improve it?"
public static int removeDuplicates(int[] a)
if (a.length==0) return 0;
int write = 1;
for (int read=1; read<a.length; read++)
if (a[read] != a[read-1]) a[write++] = a[read];
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