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Interesting Python Implementation for Next Greater Elements
In this article, we will learn about defining and user-defined functions to predict the next greatest element.
Problem statement
We are given an array & we need to print the Next Greater Element for every element present in the array. The Next greater Element for an arbitrary element y is the first greatest element present on the right side of x in array. Elements for which no greatest element exist, return -1 as output.4
Input test case
[12,1,2,3]
Output
12 -> -1 1 -> 3 2 -> 3 3 -> -1
Now let’s observe the source code.
Example
# Function
Def elevalue(arr):
# Iteration
for i in range(0, len(arr)):
# slicing max
final = max(arr[i:])
# greatest check
if (arr[i] == final):
print("% d -> % d" % (arr[i], -1))
else:
print("% d -> % d" % (arr[i], final))
# Driver program
def main():
arr = [12,1,2,3]
elevalue(arr)
arr = [1,34,2,1]
elevalue(arr)
if __name__ == '__main__':
main()Output
12 -> -1 1 -> 3 2 -> 3 3 -> -1 1 -> 34 34 -> -1 2 -> -1 1 -> -1
Conclusion
In this article, we learned about interesting python implementation for next greater elements by using a user-defined function.
Updated on: 29-Aug-2019
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