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Don't use #define ll long long int and don't use long long int either. Use auto for values and size_t for indices and cardinalities. Your method should take iterators as parameters. It will still wor …

The code can be made quite a bit more readable by moving parts of the logic into a separate class. Also, sorting the candidates by length is not helpful, even harmful in certain situations. If the sho …

The algorithm is overly complex. First, some general remarks. 1. If you use find() in a loop, you're doing it wrong. A search operation in a loop can be replaced by a grouping operation. … Kruskal's and Prim's algorithm both calculate the minimum spanning tree of a graph, but their complexity depends on edges (Kruskal) vs. vertices (Prim). …

What you implemented is the recursive solution: sum(k) | k < 0 = 0 | otherwise = max( sum(k-1), sum(k-2) + arr[k] ) You can also implement it iteratively using an O(n) extra space: sum = int[n …

Your code takes a list, ensures it's sorted and distinct, then assembles and returns another list. This approach is problematic when the input is in fact a generator, in which case your code forces th …

This is a textbook example asking for dynamic programming. The time limit is chosen such that success is impossible without dynamic programming. Dynamic programming can be applied to recursive proble …

loadTestCases(args); sort(nums.begin(),nums.end()); int cases = countPairs(nums, k); printf("%i\n",cases); return 0; } If you want to improve it any further, you must focus on the sorting algorithm … You may consider using an Integer Sorting algorithm instead of the generic comparison sort. …

func Lcm(a, b int) int { return a * b / Gcd(a, b); } The least common multiple can be calculated from the greatest common divisor, which itself can be found via Euclid's algorithm. …

I see several flaws here: It's wrong. It returns false for [0,1,2] or [1,0,2], which are a valid cyclic permutations. A permutation is cyclic if it contains at most one nontrivial cycle. [1,0,3,2] w …

There is no need for unordered maps, especially not for two of them. Also, since you are dealing with indices and counts, you should make them std::size_t, not int or generic. The datatype for storing …

The algorithm is wrong and can't be fixed. It's not dynamic programming, it's greedy: it iterates over the strings once and decides immediately which operation to perform. … Brute force The naive way to overcome this problem is a brute force algorithm. Evaluate all possible sequences of operations (insertions, deletions, replacements). …

Your algorithm can be summarized by the pseudocode: for each position in the array if a position is occupied by the wrong number find the number that fits into the position perform … a swap A better algorithm would be: for each position in the array if a number is in the wrong location find the position the number should go perform a swap This is because finding …