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Just like any other skill, problem solving takes practice to apply and master. Many developers think that becoming a better ...

Two Sum - English version Problem description: https://leetcode.com/problems/two-sum/description/ Solution code: ...

Happy number Complexity: - Time: O(n) - Space: O(n) Problem statement: ...

Find the count of numbers which are not special Complexity: - Time O(sqrt(n)) - Space O(sqrt(n)) Problem statement: ...

Climbing stairs - English Problem statement: https://leetcode.com/problems/climbing-stairs/ Solution code: ...

Remove nth node from end of the list Complexity: - Time: O(N) - Space: O(1) Problem statement: ...

Longest Palindromic substring Complexity: - Time: O(N^2) - Space: O(N) Problem statement: ...

Suma de dos version español Descripción del problema: https://leetcode.com/problems/two-sum/description/ Solución: ...

Add two numbers Complexity: - Time: O(n) - Space: O(1) Problem statement: https://leetcode.com/problems/add-two-numbers/ ...

Longest substring without repeating characters Complexity: - Time: O(n) - Space: O(1) Problem statement: ...

Validate binary search tree Complexity: - Time: O(n) where n is the number of nodes - Space: O (n) where n is the number of ...

Binary search - English Problem statement: https://leetcode.com/problems/binary-search/description/ Solution code: ...

Container with most water Complexity: - Time: O(N) - Space: O(1) Problem statement: ...

First letter to appear twice - English version Problem description: https://leetcode.com/problems/first-letter-to-appear-twice/ ...

Search insert position Complexity: - Time: O(log(n)) - Space: O(1) Problem statement: ...

Valid anagram - English version Problem description: https://leetcode.com/problems/valid-anagram/ Solution code: ...

Merge k sorted lists Complexity: - Time: O(N log N) - Space: O(log N) Problem statement: ...

Valid palindrome - English version Complexity: - Time: O(n) - Space: O(1) Problem description: ...

Palíndromo válido - Versión española Complejidad: - Tiempo O(n) - Espacio: O(1) Descripción del problema: ...

Best time to buy and sell stock Problem statement: https://leetcode.com/problems/best-time-to-buy-and-sell-stock/ Solution code: ...