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Suppose we have a number n, and we have another input c. We have to check whether n can be displayed using 7-segment displays or not. Now here is a constraint. We are only allowed to glow at most c number of LEDs.So, if the input is like n = 315 c = 17, then the output will be True as 315 needs 12 LEDs and we have 17.To solve this, we will follow these steps −seg := a list containing led counts for all digits : [6, 2, 5, 5, 4, 5, 6, 3, 7, 6]s := n as ... Read More
Suppose we have a number n. We have to check whether n is a strong prime or not. As we know a number said to be strong prime when it is a prime number that is greater than the average of nearest prime numbers.So, if the input is like num = 37, then the output will be True as nearest prime numbers are 31 and 41, the average is (31+41)/2 = 36. And 37 > 36.To solve this, we will follow these steps −if num is not prime or num is 2, thenreturn Falselast := num - 1, next := ... Read More
Suppose we have two numbers x and n. We have to check whether x is divisible by 2^n or not without using arithmetic operators.So, if the input is like x = 32 n = 5, then the output will be True as 32 = 2^5.To solve this, we will follow these steps −if x AND (2^n - 1) is 0, thenreturn Truereturn FalseExampleLet us see the following implementation to get better understanding − Live Demodef solve (x, n): if (x & ((1
Suppose we have a number n. We have another two numbers a and b. We have to check whether we can generate a number using a and b that divides n.So, if the input is like n = 115, a = 3, b = 2, then the output will be True as 115 is divisible by 23 which is made of 2 and 3.To solve this, we will follow these steps −Define a function util() . This will take temp, a, b, nif temp > n, thenreturn Falseif n is divisible by temp, thenreturn Truereturn true when at least one ... Read More
Suppose we have a number n, we have to check whether n is a Factorial prime or not. As we know a number is said to be a factorial prime when it is a prime number that is one less than or one more than a factorial of any number.So, if the input is like n = 719, then the output will be True as 719 = 720 - 1 = 6! - 1To solve this, we will follow these steps −if num is not a prime, thenreturn Falsefactorial := 1, i := 1while factorial
Suppose we have a number target. We have another two numbers A and B. We have to check whether we can get target by adding A and B as many times as we want.So, if the input is like Target = 26 A = 5 B = 7, then the output will be True as we can get 26 by adding A and B like (7 + 7 + 7 + 5).To solve this, we will follow these steps −Define a function util() . This will take x, a, b, is_ok, targetif x > target, thenreturnif is_ok[x] is True, thenreturnis_ok[x] ... Read More
Suppose we have one binary list, where 1 denotes push operation and 0 denotes a pop operation on a stack or a queue. We have to check whether the possible set of operations are valid or not.So, if the input is like nums = [1, 0, 1, 1, 0, 1], then the output will be True as the sequence is [Push, Pop, Push, Push, Pop, Push] as we are not popping element from empty list so these operations are valid.To solve this, we will follow these steps −push_count := 0for i in range 0 to size of nums - 1, ... Read More
Suppose we have a number n. We have to check whether the mirror image of the number is same as the given number or not when it is displayed on Seven Segment display.So, if the input is like n = 818, then the output will be True.the mirror image is same.To solve this, we will follow these steps −num_str := n as stringfor i in range 0 to size of num_str - 1, doif num_str[i] is not nay of ['0', '1', '8'] then, thenreturn Falseleft := 0right := size of num_str - 1while left < right, doif num_str[left] is not ... Read More
Suppose we have two strings s and t, we have to select the most frequent character from s and then we have to check whether that particular character is present in t same number of times or not.So, if the input is like s = "crosssection", t = "securesystem", then the output will be True, as the most frequent character in s is 's'. And there are same number of occurrences of 's' in t.To solve this, we will follow these steps −freq := a map containing all characters of s and their frequenciesmax_freq_char = character in s where frequency ... Read More
Suppose we have a square matrix. We have to check whether the matrix remains same after performing row reversal operations on each row, or not.So, if the input is like686282333then the output will be TrueTo solve this, we will follow these steps −n := row count of matrixfor i in range 0 to n - 1, doleft := 0, right := n - 1while left