# List Comprehensions

### Problem Statement :

```Let's learn about list comprehensions! You are given three integers x,y and z representing the dimensions of a cuboid along with an integer i. Print a list of all possible coordinates given by (i,j,k) 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 [i,j,k] 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 x,y,z and n, each on a separate line.

Constraints:
Print the list in lexicographic increasing order.```

### Solution :

```                            ```Solution in C :

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:
output.append([i,j,k])

print(output)```
```

## QHEAP1

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## Minimum Average Waiting Time

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