A peak element is an element that is greater than its neighbors.
Given an input array where num[i] ≠ num[i+1], find a peak element and return its index.
The array may contain multiple peaks, in that case return the index to any one of the peaks is fine.
You may imagine that num[-1] = num[n] = -∞.
For example, in array [1, 2, 3, 1], 3 is a peak element and your function should...
Sunday, 12 September 2021
Tuesday, 7 September 2021
Valid Palindrome
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
For example, "A man, a plan, a canal: Panama" is a palindrome.
"race a car" is not a palindrome.
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bool isPalindrome(char* s) {
int i, j, len;
len = strlen(s);
i = 0; j = len - 1;
while(i...
