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README.md
README.md
 
 
REPLACE-ELEMENT-WITH-greater-on-right-side.cpp
REPLACE-ELEMENT-WITH-greater-on-right-side.cpp
 
 
average-of-levels-in-binary-tree.cpp
average-of-levels-in-binary-tree.cpp
 
 
average-salary-excluding-min-and-max.cpp
average-salary-excluding-min-and-max.cpp
 
 
average-salary.py
average-salary.py
 
 
big-countries.sql
big-countries.sql
 
 
binary-number-with-alternating-bits.cpp
binary-number-with-alternating-bits.cpp
 
 
binary-search.cpp
binary-search.cpp
 
 
binary-tree-inorder.cpp
binary-tree-inorder.cpp
 
 
binary-tree-level-order-traversal-ii.cpp
binary-tree-level-order-traversal-ii.cpp
 
 
binary-tree-level-order-traversal.cpp
binary-tree-level-order-traversal.cpp
 
 
binary-tree-preorder-traversal.cpp
binary-tree-preorder-traversal.cpp
 
 
check-if-a-number-is-majority-element-in-a-sorted-array.cpp
check-if-a-number-is-majority-element-in-a-sorted-array.cpp
 
 
check-if-a-tree-is-a-bst.cpp
check-if-a-tree-is-a-bst.cpp
 
 
check-if-n-and-its-double-exists.cpp
check-if-n-and-its-double-exists.cpp
 
 
contains-duplicate.cpp
contains-duplicate.cpp
 
 
contains_duplicate.py
contains_duplicate.py
 
 
convert-binary-number-in-a-inked-list.cpp
convert-binary-number-in-a-inked-list.cpp
 
 
count-negative-numbers-in-a-sorted-matrix.cpp
count-negative-numbers-in-a-sorted-matrix.cpp
 
 
count-number-of-teams.cpp
count-number-of-teams.cpp
 
 
countOdds.py
countOdds.py
 
 
count_odds_in_number_interval.cpp
count_odds_in_number_interval.cpp
 
 
counting-bits.cpp
counting-bits.cpp
 
 
create-targe-array-in-the-given-order.cpp
create-targe-array-in-the-given-order.cpp
 
 
day-of-the-week.cpp
day-of-the-week.cpp
 
 
defaining-an-ip.cpp
defaining-an-ip.cpp
 
 
detect-capital.cpp
detect-capital.cpp
 
 
element-appearing-more-than-25-in-sorted-array.cpp
element-appearing-more-than-25-in-sorted-array.cpp
 
 
final-prices-with-a-special-discount-in-a-shop.cpp
final-prices-with-a-special-discount-in-a-shop.cpp
 
 
find-all-duplicates-in-an-array.cpp
find-all-duplicates-in-an-array.cpp
 
 
find-duplicate.cpp
find-duplicate.cpp
 
 
find-largest-value-in-each-tree-row.cpp
find-largest-value-in-each-tree-row.cpp
 
 
find-numbers-with-even-digits.cpp
find-numbers-with-even-digits.cpp
 
 
find-peak-element-facebook.cpp
find-peak-element-facebook.cpp
 
 
find-peak-element.cpp
find-peak-element.cpp
 
 
find-the-difference.cpp
find-the-difference.cpp
 
 
find-the-duplicate-number.cpp
find-the-duplicate-number.cpp
 
 
find_pivot_index.cpp
find_pivot_index.cpp
 
 
first-last-index-of-an-element.cpp
first-last-index-of-an-element.cpp
 
 
first-unique-character.cpp
first-unique-character.cpp
 
 
fizz-buzz.cpp
fizz-buzz.cpp
 
 
fun-with-arays.cpp
fun-with-arays.cpp
 
 
how-many-numbers-are-smaller-then-current-number.cpp
how-many-numbers-are-smaller-then-current-number.cpp
 
 
implement-queue-suing-stacks.cpp
implement-queue-suing-stacks.cpp
 
 
invalid-tweets.sql
invalid-tweets.sql
 
 
jewels-and-stones.cpp
jewels-and-stones.cpp
 
 
kids-with-the-greatest-number-of-candies.cpp
kids-with-the-greatest-number-of-candies.cpp
 
 
kth-larghest-element0-in-an-array.cpp
kth-larghest-element0-in-an-array.cpp
 
 
larghest-unique-number.cpp
larghest-unique-number.cpp
 
 
lca-of-binary-tree.cpp
lca-of-binary-tree.cpp
 
 
length-of-last-word.cpp
length-of-last-word.cpp
 
 
linked-list-cycle.cpp
linked-list-cycle.cpp
 
 
lucky_number_in_an_array.cpp
lucky_number_in_an_array.cpp
 
 
majority-element.cpp
majority-element.cpp
 
 
matrix-diagonal-sum.cpp
matrix-diagonal-sum.cpp
 
 
max-consecutive-onse.cpp
max-consecutive-onse.cpp
 
 
max-depth-of-binary-tree.cpp
max-depth-of-binary-tree.cpp
 
 
maximum-69-number.cpp
maximum-69-number.cpp
 
 
maximum-count-of-positive-integer-and-negative-integer.cpp
maximum-count-of-positive-integer-and-negative-integer.cpp
 
 
maximum-product-of-two-elements-in-an-array.cpp
maximum-product-of-two-elements-in-an-array.cpp
 
 
median-of-two-sorted-arrays.cpp
median-of-two-sorted-arrays.cpp
 
 
merge-sorted-array.cpp
merge-sorted-array.cpp
 
 
middle-of-linked-list.cpp
middle-of-linked-list.cpp
 
 
missing-number.cpp
missing-number.cpp
 
 
morris.cpp
morris.cpp
 
 
most-common-word.cpp
most-common-word.cpp
 
 
move-zeros.cpp
move-zeros.cpp
 
 
n-repeated-element-in-size-2n-array.cpp
n-repeated-element-in-size-2n-array.cpp
 
 
no_of_provinces.cpp
no_of_provinces.cpp
 
 
number-of-1-bits.cpp
number-of-1-bits.cpp
 
 
number-of-islands.cpp
number-of-islands.cpp
 
 
number-of-students-doing-homework-at-a-given-time.cpp
number-of-students-doing-homework-at-a-given-time.cpp
 
 
number_of_good_pairs.cpp
number_of_good_pairs.cpp
 
 
palindrome-linked-list.cpp
palindrome-linked-list.cpp
 
 
palindrome.cpp
palindrome.cpp
 
 
postorder-tree.cpp
postorder-tree.cpp
 
 
power-of-tree.cpp
power-of-tree.cpp
 
 
power-of-two.cpp
power-of-two.cpp
 
 
range-sum-of-bst.cpp
range-sum-of-bst.cpp
 
 
recyclable-and-low-fat-products.sql
recyclable-and-low-fat-products.sql
 
 
remove-duplicates-from-array.cpp
remove-duplicates-from-array.cpp
 
 
remove-duplicates-from-linked-list.cpp
remove-duplicates-from-linked-list.cpp
 
 
remove-vowels-from-a-string.cpp
remove-vowels-from-a-string.cpp
 
 
replace_element.cpp
replace_element.cpp
 
 
reverse-integer.cpp
reverse-integer.cpp
 
 
reverse-linked-list.cpp
reverse-linked-list.cpp
 
 
reverse-only-letters.cpp
reverse-only-letters.cpp
 
 
reverse-string.cpp
reverse-string.cpp
 
 
reverse-vowels-of-a-string.cpp
reverse-vowels-of-a-string.cpp
 
 
reverse-words-in-a-string-iii.cpp
reverse-words-in-a-string-iii.cpp
 
 
reverse-words-in-a-string.cpp
reverse-words-in-a-string.cpp
 
 
reverse_string2.cpp
reverse_string2.cpp
 
 
richest-customer-wealth.cpp
richest-customer-wealth.cpp
 
 
running-sum-of-1d-array.cpp
running-sum-of-1d-array.cpp
 
 
search-2d-matrix.cpp
search-2d-matrix.cpp
 
 
search-in-a-rotated-sorted-array.cpp
search-in-a-rotated-sorted-array.cpp
 
 
search-in-binary-search-tree.cpp
search-in-binary-search-tree.cpp
 
 
search-in-rotated-sorted-array-ii.cpp
search-in-rotated-sorted-array-ii.cpp
 
 
search-in-rotated-sorted-array.cpp
search-in-rotated-sorted-array.cpp
 
 
search-insert-position.cpp
search-insert-position.cpp
 
 
self-dividing-numbers.cpp
self-dividing-numbers.cpp
 
 
shaffle_the_array.cpp
shaffle_the_array.cpp
 
 
singleNumber.cpp
singleNumber.cpp
 
 
single_number_III.cpp
single_number_III.cpp
 
 
sort-an-array.cpp
sort-an-array.cpp
 
 
sort-array-by-parity-ii.cpp
sort-array-by-parity-ii.cpp
 
 
sort-array-by-parity.cpp
sort-array-by-parity.cpp
 
 
sort_colors.cpp
sort_colors.cpp
 
 
squares-of-a-sorted-array.cpp
squares-of-a-sorted-array.cpp
 
 
subtract-the-product-and-sum-of-digits-of-an-integer.cpp
subtract-the-product-and-sum-of-digits-of-an-integer.cpp
 
 
sudoku_sol.cpp
sudoku_sol.cpp
 
 
sum-of-digits-in-the-minimum-number.cpp
sum-of-digits-in-the-minimum-number.cpp
 
 
sum_two_linked_list.cpp
sum_two_linked_list.cpp
 
 
swap-nodes-in-pairs.cpp
swap-nodes-in-pairs.cpp
 
 
three-consecutive-odds.cpp
three-consecutive-odds.cpp
 
 
to-lower-case.cpp
to-lower-case.cpp
 
 
two-sum.cpp
two-sum.cpp
 
 
two_sum.py
two_sum.py
 
 
unique-number-of-occurrences.cpp
unique-number-of-occurrences.cpp
 
 
valid-anagram.cpp
valid-anagram.cpp
 
 
valid-palindrome.cpp
valid-palindrome.cpp
 
 
valid-parentheses
valid-parentheses
 
 
vertical_trav.cpp
vertical_trav.cpp
 
 

README.md

Index of core solutions for interview preparation

Note: Not all the solutions reported in this index are the coding challenges solved on leetcode. I decided to create this index once I switched to interview preparation. Open the leetcode folder to see a wider set of solutions.

Exercise Solution
Contains Duplicate Python
Two sum Python
Sort colors C++
maximum-count-of-positive-integer-and-negative-integer C++