https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/
https://leetcode.com/problems/find-all-duplicates-in-an-array/
https://leetcode.com/problems/min-stack/
https://leetcode.com/problems/valid-parentheses/
https://leetcode.com/problems/valid-parenthesis-string/
https://leetcode.com/problems/remove-outermost-parentheses/
https://leetcode.com/problems/generate-parentheses/ https://leetcode.com/problems/longest-valid-parentheses/
https://www.hackerrank.com/contests/code-maestros-14-04/challenges/baby-step
https://leetcode.com/problems/evaluate-reverse-polish-notation/
https://www.hackerrank.com/contests/cs1300-odd-2014/challenges/evaluate-expression
https://leetcode.com/problems/simplify-path/
https://leetcode.com/problems/max-increase-to-keep-city-skyline/
https://leetcode.com/problems/the-skyline-problem/
https://leetcode.com/problems/largest-rectangle-in-histogram/
https://leetcode.com/problems/maximal-rectangle/
https://www.youtube.com/watch?v=lsQTYlCiU6c
https://leetcode.com/problems/trapping-rain-water/
https://leetcode.com/problems/trapping-rain-water-ii/
https://leetcode.com/problems/container-with-most-water/
https://www.youtube.com/watch?v=RV7jsfvJ33U
https://leetcode.com/problems/pour-water/
https://leetcode.com/problems/basic-calculator/
https://leetcode.com/problems/basic-calculator-ii/
https://leetcode.com/problems/basic-calculator-iii/
https://leetcode.com/problems/basic-calculator-iv/
https://leetcode.com/problems/build-binary-expression-tree-from-infix-expression/
https://leetcode.com/problems/remove-duplicate-letters/
https://leetcode.com/problems/tag-validator/
https://leetcode.com/problems/number-of-atoms/
https://leetcode.com/problems/maximum-frequency-stack/
https://leetcode.com/problems/odd-even-jump/
https://leetcode.com/problems/number-of-valid-subarrays/
https://leetcode.com/problems/next-greater-element-i/
https://leetcode.com/problems/remove-k-digits/
https://leetcode.com/problems/subarray-sum-equals-k/
https://leetcode.com/problems/subarray-product-less-than-k/
https://leetcode.com/problems/subarray-sums-divisible-by-k/
https://leetcode.com/problems/maximum-size-subarray-sum-equals-k/
https://leetcode.com/problems/max-points-on-a-line/solution/
https://leetcode.com/problems/substring-with-concatenation-of-all-words/
https://leetcode.com/problems/unique-email-addresses/
https://leetcode.com/problems/string-transforms-into-another-string/
- [2, 3, 9 , 1, 5]
- For every element find the nearest element which is greater than element
- ans: [3, 5, -1, 5, -1]
- Brute force Approach:
- Start traversing from left to right let's say i
- Find element which is greater than current element i
- Approach using stack
- Example: [2, 6, 9, 8, 1]
- Monotonically increasing stack
- Monotically decreasing stack
- Whenever need to find out next smaller element, we need increasing stack
const stack = [];
for (let i=0; i < A.length; i++) {
while(stack.length > 0 && stack[stack.length - 1] > A[i]) {
stack.pop()
}
stack.push(A[i])
}
https://leetcode.com/problems/next-greater-element-i/
https://leetcode.com/problems/next-greater-element-ii/
https://leetcode.com/problems/next-greater-element-iii/
https://leetcode.com/problems/daily-temperatures/
https://leetcode.com/problems/shortest-unsorted-continuous-subarray/
https://leetcode.com/problems/online-stock-span/
https://leetcode.com/problems/132-pattern/
https://leetcode.com/problems/sum-of-subarray-minimums/
https://leetcode.com/problems/largest-rectangle-in-histogram/
https://leetcode.com/problems/odd-even-jump/
https://leetcode.com/problems/maximize-distance-to-closest-person/
https://leetcode.com/problems/132-pattern/
https://leetcode.com/problems/best-time-to-buy-and-sell-stock/
https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/
https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iii/
https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv/
https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-cooldown/
https://leetcode.com/problems/bulb-switcher
https://leetcode.com/problems/bulb-switcher-ii
https://leetcode.com/problems/bulb-switcher-iii/
https://leetcode.com/problems/bulb-switcher-iv/ (Removed)
https://www.youtube.com/watch?v=m4hvxzLoN_I