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Sum of numbers in string
Basic Accuracy: 58.58% Submissions: 9906 Points: 1

Given a string str containing alphanumeric characters. The task is to calculate the sum of all the numbers present in the string.

Example 1:

Input:
str = 1abc23
Output: 24
Explanation: 1 and 23 are numbers in the
string which is added to get the sum as
24.


Example 2:

Input:
str = geeks4geeks
Output: 4
Explanation: 4 is the only number, so the
sum is 4.

The task is to complete the function findSum() which finds and returns the sum of numbers in the string.

Expected Time Complexity: O(N)
Expected Auxiliary Space: O(N)

Constraints:
1 <= length of the string <= 105
Sum of Numbers <= 105

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