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Watson asks Sherlock: Given a string S of N 0's and M 1's, how many unique permutations of this string start with 1? Help Sherlock by printing the answer modulo (109+7). Input Format First line contains T, the number of test cases. Each test case
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Sam's house has an apple tree and an orange tree that yield an abundance of fruit. In the diagram below, the red region denotes his house, where is the start point, and is the endpoint. The apple tree is to the left of his house, and the orange
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Given a time in 12-hour AM/PM format, convert it to military (24-hour) time. Note: Midnight is 12:00:00AM on a 12-hour clock, and 00:00:00 on a 24-hour clock. Noon is 12:00:00PM on a 12-hour clock, and 12:00:00 on a 24-hour clock. Function
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You are in charge of the cake for your niece's birthday and have decided the cake will have one candle for each year of her total age. When she blows out the candles, she’ll only be able to blow out the tallest ones. Your task is to
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Given five positive integers, find the minimum and maximum values that can be calculated by summing exactly four of the five integers. Then print the respective minimum and maximum values as a single line of two space-separated long integers. For example, arr= [1,3,5,7,9] . Our minimum sum
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Consider a staircase of size : # ## ### #### Observe that its base and height are both equal to , and the image is drawn using # symbols and spaces. The last line is not preceded by any spaces. Write a program that prints a staircase of size . Function Description Complete the staircase function in the
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Given an array of integers, calculate the fractions of its elements that are positive, negative, and are zeros. Print the decimal value of each fraction on a new line. Note: This challenge introduces precision problems. The test cases are scaled to six decimal places, though answers with absolute error of
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Given a square matrix, calculate the absolute difference between the sums of its diagonals. For example, the square matrix is shown below: 1 2 3 4 5 6 9 8 9 The left-to-right diagonal = . The right to left diagonal = . Their absolute difference is . Function description Complete the function in the
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Calculate and print the sum of the elements in an array, keeping in mind that some of those integers may be quite large. Function Description Complete the aVeryBigSum function in the editor below. It must return the sum of all array elements. aVeryBigSum has the following parameter(s): * ar: an
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Alice and Bob each created one problem for HackerRank. A reviewer rates the two challenges, awarding points on a scale from 1 to 100 for three categories: problem clarity, originality, and difficulty. We define the rating for Alice's challenge to be the triplet , and the rating for Bob&
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Given an array of integers, find the sum of its elements. For example, if the array ar = [1,2,3], 1+2+3 =6 , so return 6. Function Description Complete the simpleArraySum function in the editor below. It must return the sum of the array elements as an integer. simpleArraySum
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Complete the function solveMeFirst to compute the sum of two integers. Function prototype: int solveMeFirst(int a, int b); where, * a is the first integer input. * b is the second integer input Return values * sum of the above two integers Sample Input a = 2 b = 3 Sample Output 5 Explanation