Skip to content

Create: 0374-guess-number-higher-or-lower.swift #2180

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jan 30, 2023
Merged

Create: 0374-guess-number-higher-or-lower.swift #2180

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
23 changes: 23 additions & 0 deletions swift/0374-guess-number-higher-or-lower.swift
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
// Time: O(log n)
// Space: O(1)
class Solution : GuessGame {
func guessNumber(_ n: Int) -> Int {
// return a num btw 1,..,n
var low = 1
var high = n

while true {
let mid = low + (high - low) / 2
let myGuess = guess(mid)
if myGuess == 1 {
low = mid + 1
}
else if myGuess == -1 {
high = mid - 1
}
else {
return mid
}
}
}
}