Maths

130+ posts

Last Updated: 06 January 2024

2sinacosb is one of the important trigonometric formulas which is equal to sin (a + b) + sin (a - b). It is one of the product-to-sum formul...read more

Maths

Mathematics

School Learning

Maths-Formulas

Find two integers X and Y with given GCD P and given difference between their squares Q

Last Updated: 16 December 2021

Given two integers P and Q, the task is to find any two integers whose Greatest Common Divisor(GCD) is P and the difference between their sq ...read more

Minimum and Maximum LCM among all pairs (i, j) in range [L, R]

Last Updated: 06 July 2022

Given two positive integers L and R representing a range. The task is to find the minimum and maximum possible LCM of any pair (i, j) in the ...read more

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Check if any permutation of a given string is lexicographically larger than the other given string

Last Updated: 07 June 2023

Given two strings str1 and str2 of same length N, the task is to check if there exists any permutation possible in any of the given strings, ...read more

lexicographic-ordering

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strings

DSA

Maximum count of X that can be inserted with no 3 adjacent characters are X

Last Updated: 25 April 2022

Given a string, str of length N and a character X, the task is to find the maximum count of characters X that are to be inserted into the st ...read more

Arrays

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Check if two given Rational Numbers are equal or not

Last Updated: 21 October 2023

Given two strings S and T representing non-negative rational numbers, the task is to check if the values of S and T are equal or not. If fou ...read more

Calculate the value of 2 raised to the power of twice the binary representation of N

Last Updated: 19 June 2022

Given a positive integer N, the task is to find the value of (22 * X), where X is the binary representation of N. Since the answer can be ve ...read more

Check if a right-angled triangle can be formed by the given side lengths

Last Updated: 01 October 2021

Given two positive integers A and B representing the sides of a triangle, the task is to check if the given two sides of the triangle are si ...read more

Count of nested polygons that can be drawn by joining vertices internally

Last Updated: 07 April 2021

Given a regular polygon with N sides. The task is to find the count of polygons that can be drawn from the given polygon by joining the vert...read more

Greedy

Mathematical

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Find two distinct numbers such that their LCM lies in given range

Last Updated: 31 January 2022

Given two numbers L and R, the task is to find two distinct minimum positive integers X and Y such that whose LCM lies in the range [L, R]. ...read more

Mathematical

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Maximum count of pairwise co-prime and common divisors of two given numbers

Last Updated: 11 May 2021

Given an array of pairs arr[] of two numbers {N, M}, the task is to find the maximum count of common divisors for each pair N and M such tha ...read more

Mathematical

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Count of N digit Numbers whose sum of every K consecutive digits is equal

Last Updated: 10 September 2021

Given two integers N and K, the task is to find the total count of N-digit number such that the sum of every K consecutive digits of the num ...read more

Greedy

Mathematical

Competitive Programming

number-digits

sliding-window

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two-pointer-algorithm

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Check if given number contains a digit which is the average of all other digits

Last Updated: 07 October 2022

Given an integer N, the task is to check whether N contains a digit D such that it is the average of all other digits present in N.Examples: ...read more

Find the maximum sum (a+b) for a given input integer N satisfying the given condition

Last Updated: 22 November 2021

Given an integer N, the task is to find the largest sum (a + b) {1 ? a ? N, 1 ? b ? N} such that a * b/(a + b) is an integer (i.e a + b divi ...read more

Python | Inverse Number Theoretic Transformation

Last Updated: 26 August 2019

Inverse Number Theoretic Transform is a Fast Fourier transform theorem generalization. It is obtained by the replacement of e^(-2piik/N) wit ...read more

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