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How to Solve Account Balance After Rounded Purchase Problem
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Easy#2806
LeetCode ProblemAccount Balance After Rounded Purchase
Initially, you have a bank account balance of 100 dollars. You are given an integer purchaseAmount representing the amount you will spend on a purchase in dollars, in other words, its price. When making the purchase, first the purchaseAmount is rounded to the nearest multiple of 10. Let us call this value roundedAmount. Then, roundedAmount dollars are removed from your bank account. Return an integer denoting your final bank account balance after this purchase. Notes:
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Problem Breakdown
Understanding the Account Balance After Rounded Purchase Problem
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Problem Statement
Initially, you have a bank account balance of 100 dollars. You are given an integer purchaseAmount representing the amount you will spend on a purchase in dollars, in other words, its price. When making the purchase, first the purchaseAmount is rounded to the nearest multiple of 10. Let us call this value roundedAmount. Then, roundedAmount dollars are removed from your bank account. Return an integer denoting your final bank account balance after this purchase. Notes:
EasyProblem #2806
LeetCodeAccount Balance After Rounded Purchase
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Examples
# Example 1
Input
purchaseAmount = 9
Output
90
# Example 2
Input
purchaseAmount = 15
Output
80
# Example 3
Input
purchaseAmount = 10
Output
90
Constraints
0 <= purchaseAmount <= 100
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Solve Account Balance After Rounded Purchase — Initially, you have a bank account balance of 100 dollars. You are given an inte...
Here's the optimal approach using Math:
def solve(input):
# Optimal O(n) solution
return result
Time: O(n) | Space: O(n)
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