leet-code/guess-number-higher-or-lower/sol.rs

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Rust
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2022-06-11 11:44:46 +00:00
/**
* Forward declaration of guess API.
* @param num your guess
* @return -1 if num is higher than the picked number
* 1 if num is lower than the picked number
* otherwise return 0
* unsafe fn guess(num: i32) -> i32 {}
*/
impl Solution {
unsafe fn guessNumber(n: i32) -> i32 {
let (mut min, mut max) = (1, n);
while min != max {
let guess_num = max / 2 + min / 2;
match guess(guess_num) {
-1 => max = guess_num - 1,
1 => min = guess_num + 1,
_ => return guess_num
}
}
min
}
}