#940 · #1611 · Minimum One Bit Operations to Make Integers Zero(使整数变为 0 的最少操作次数)

Given an integer n, the allowed operations are: (1) flip the lowest bit (bit 0); (2) flip bit i for any i >= 1 provided bit i is 1 and all lower bits are 0. Return the minimum number of operations to turn n into 0. Constraints: 0 <= n <= 10^9.