Issue in JavaScript course project

Question

In 23 Code Project (The Snail in the Well) in the JavaScript course, the algorithm seems to work on every test case except for Test Case #3. No matter what code I write, it always works on everything except for this test case. Since the test case is hidden, I can't see what's wrong. Does anyone know?

Answer 1

Koei Moon

2nd case will also work if you do

while (feet <= depth)

And

if (feet >= depth)

Answer 2

Please provide your attemp so we can see what you are doing wrong.

Answer 3

Attempts?

Answer 4

As I was sending the attempts, I noticed I never tried a for loop even though I thought I did. So I wrote an algorithm using a for loop, and surprisingly it worked on all test cases. I still wonder what I did wrong in the while loops though, so I will send my attempts here (including the one that worked).

Attempt 1:
function main() {
var depth = parseInt(readLine(),10);
//your code goes here
var days = 0
var feet = 0

while (feet < depth) {
if (feet + 7 == depth) {
feet += 7
days++
}
else {
feet += 7-2
days++
}

}
console.log(days)
}

Attempt 2:
function main() {
var depth = parseInt(readLine(),10);
//your code goes here
var feet = 0
var day = 0

while (feet < depth) {
feet += 7
day++

if (feet == depth) {
break
}
else {
feet -= 2
}
}
console.log(day)
}

Attempt 3 (The one that worked):
function main() {
var depth = parseInt(readLine(), 10);
//your code goes here
var feet = 0

for (var day = 0; feet < depth;) {
feet += 7
if (feet >= depth) {
day++
console.log(day)
break
}
else {
feet -= 2
day++
}
}

}

Answer 5

A͢J I tried it and it worked, so thanks! I also fixed the code in attempt 1, though I had to make more adjustments for it to work. It seems like the problem was that in attempt 3 'feet' was already equal to 'depth' in the beginning, and the condition for my while loop did not include that. But in the for loop, the condition doesn't include that either, and it still works. So maybe the problem was something else?

Answer 6

function main() {
var depth = parseInt(readLine(), 10);
//your code goes here
let days = 0;
let result = 0;

while (depth) {
days++;
result += 7;
if (days != 6) {
result -= 2;
}

if (depth <= result) break;
}

console.log(days);
}
also case 3 doesn't work