Deposit Profit
Description
You have deposited a specific amount of dollars into your bank account. Each year your balance increases at the same growth rate. Find out how long it would take for your balance to pass a specific threshold with the assumption that you don’t make any additional deposits.
Example
For deposit = 100, rate = 20 and threshold = 170, the output should be
depositProfit(deposit, rate, threshold) = 3.
Each year the amount of money on your account increases by 20%. It means that throughout the years your balance would be:
- year 0:
100; - year 1:
120; - year 2:
144; - year 3:
172,8.
Thus, it will take 3 years for your balance to pass the threshold, which is the answer.
Input/Output
-
[execution time limit] 4 seconds (js)
-
[input] integer deposit
The initial deposit as a positive integer.
Guaranteed constraints:
1 ≤ deposit ≤ 100.
- [input] integer rate
The rate of increase. Each year the balance increases by the rate percent of the current sum.
Guaranteed constraints:
1 ≤ rate ≤ 100.
- [input] integer threshold
The target balance.
Guaranteed constraints:
deposit ≤ threshold ≤ 100.
- [output] integer
The number of years it would take to hit the threshold.
[JavaScript (ES6)] Syntax Tips
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// Prints help message to the console
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Solution
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function depositProfit(deposit, rate, threshold) {
var i = 0;
while(deposit < threshold){
i++;
deposit += deposit*rate/100;
}
return i;
}