List Comprehensions Hacker Rank Solution – Queslers

Problem: List Comprehensions Hacker Rank Solution

Let’s learn about list comprehensions! You are given three integers xy and z representing the dimensions of a cuboid along with an integer n. Print a list of all possible coordinates given by (ijk) on a 3D grid where the sum of i + j + k is not equal to n. Here, 0 <= i <= x; 0 <= j <= y; 0 <= k <= z. Please use list comprehensions rather than multiple loops, as a learning exercise.

Example

x = 1

y = 1

z = 2

n = 3 

All permutations of [ijk] are:

[[0, 0, 0], [0, 0, 1], [0, 0, 2], [0, 1, 0], [0, 1, 1], [0, 1, 2], [1, 0, 0], [1, 0, 1], [1, 0, 2], [1, 1, 0], [1, 1, 1], [1, 1, 2]].

Print an array of the elements that do not sum to n = 3.

[[0, 0, 0], [0, 0, 1], [0, 0, 2], [0, 1, 0], [0, 1, 1], [1, 0, 0], [1, 0, 1],  [1, 1, 0],  [1, 1, 2]]

Input Format 

Four integers xyz and n, each on a separate line.

Constraints 

Print the list in lexicographic increasing order.

Sample Input 0

1
1
1
2

Sample Output 0

[[0, 0, 0], [0, 0, 1], [0, 1, 0], [1, 0, 0], [1, 1, 1]]

Explanation 0

Each variable xy and z will have values of 0 or 1. All permutations of lists in the form [ijk] = [[0, 0, 0], [0, 0, 1], [0, 1, 0], [0, 1, 1], [1, 0, 0], [1, 0, 1],  [1, 1, 0]].

Sample Input 1

2
2
2
2

Sample Output 1

[[0, 0, 0], [0, 0, 1], [0, 1, 0], [0, 1, 2], [0, 2, 1], [0, 2, 2], [1, 0, 0], [1, 0, 2], [1, 1, 1], ]

List Comprehensions Hacker Rank Solution

if __name__ == '__main__':
    x = int(input())
    y = int(input())
    z = int(input())
    n = int(input())
    output=[]
    for i in range(x+1):
        for j in range(y+1):
            for k in range(z+1):
                if i+j+k==n:
                    continue
                else:
                    out.append([i,j,k])
    
    print(output)
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