java 397.整数替换（＃）。java

Posted 2021-05-08

public int integerReplacement(int n) {
    int c = 0;
    while (n != 1) {
        if ((n & 1) == 0) {
            n >>>= 1;
        } else if (n == 3 || Integer.bitCount(n + 1) > Integer.bitCount(n - 1)) {
            --n;
        } else {
            ++n;
        }
        ++c;
    }
    return c;
}

public class Solution {
    public int integerReplacement(int n) {
        int c = 0;
        while (n != 1) {
            if ((n & 1) == 0) {
                n >>>= 1;
            } else if (n == 3 || ((n >>> 1) & 1) == 0) {
                --n;
            } else {
                ++n;
            }
            ++c;
        }
        return c;
    }
}