[Stage 15] Add Border

Given a rectangular matrix of characters, add a border of asterisks(*) to it.

[Stage 14] Alternating Sums

Several people are standing in a row and need to be divided into two teams. The first person goes into team 1, the second goes into team 2, the third goes into team 1 again, the fourth into team 2, and so on.

[Stage 13] Reverse Parentheses

You have a string s that consists of English letters, punctuation marks, whitespace characters, and brackets. It is guaranteed that the parentheses in s form a regular bracket sequence.

[Basic] Remaining String

Given a string without spaces, a character, and a count, the task is to print the string after the specified character has occurred count number of times.
Print “Empty string” incase of any unsatisfying conditions.
(Given character is not present, or present but less than given count, or given count completes on last index).
If given count is 0, then given character doesn’t matter, just print the whole string.

[School] Alone in couple

In a party everyone is in couple except one. People who are in couple have same numbers. Find out the person who is not in couple.

[Basic] Number is sparse or not

Given a number, check whether it is sparse or not. A number is said to be a sparse number if in binary representation of the number no two or more consecutive bits are set.

[Basic] Longest Consecutive 1's

Given a number N, Your task is to find the length of the longest consecutive 1’s in its binary representation.

[Basic] Count total set bits

Find the sum of all bits from numbers 1 to N.

[Basic] Rotate by 90 degree

Given an square matrix, turn it by 90 degrees in anti-clockwise direction without using any extra space.

[Forms] Overview

구글 번역의 도움을 (많이) 받아 장고 공식 문서를 번역하였습니다.

Hello coding 그림으로 개념을 이해하는 알고리즘 Chapter 2. 선택정렬

메모리가 동작하는 방법

[Basic] Factorial

Calculate the factorial for a given number.

[Basic] Minimize string value

Given a string of lowercase alphabets and a number k, the task is to print the minimum value of the string after removal of ‘k’ characters. The value of a string is defined as sum of squares of count of each distinct character. For example consider the string “saideep”, here frequencies of characters are s-1, a-1, i-1,e-2, d-1, p-1 and value of the string is 1^2 + 1^2 + 1^2 + 1^2 + 1^1 + 2^2 = 9.

[Easy] Majority Element

Write a program to find the majority element in the array. A majority element in an array A[] of size n is an element that appears more than n/2 times (and hence there is at most one such element). If input array doesn’t contain a majority element, then output “NO Majority Element”

[Basic] Index of first 1 in a sorted array of 0's and 1's

Given a sorted array consisting 0’s and 1’s. The task is to find the index of first ‘1’ in the sorted array.