69. Sqrt(x)
Given a non-negative integer x
, compute and return the square root of x
.
Since the return type is an integer, the decimal digits are truncated, and only the integer part of the result is returned.
Example 1:
Input: x = 4 Output: 2
Example 2:
Input: x = 8 Output: 2 Explanation: The square root of 8 is 2.82842..., and since the decimal part is truncated, 2 is returned.
Constraints:
0 <= x <= 231 - 1
Rust Solution
struct Solution;
impl Solution {
fn my_sqrt(x: i32) -> i32 {
(x as f64).sqrt().floor() as i32
}
}
#[test]
fn test() {
assert_eq!(Solution::my_sqrt(8), 2);
}
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