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| // @Title: 统计按位或能得到最大值的子集数目 (Count Number of Maximum Bitwise-OR Subsets)
// @Author: 15816537946@163.com
// @Date: 2022-03-15 18:25:26
// @Runtime: 8 ms
// @Memory: 1.8 MB
func countMaxOrSubsets(nums []int) int {
maxOr := 0
var ans int
var dfs func(int, int)
dfs = func(pos, or int) {
if pos == len(nums) {
if or > maxOr {
maxOr = or
ans = 1
} else if or == maxOr {
ans++
}
return
}
dfs(pos+1, or|nums[pos])
dfs(pos+1, or)
}
dfs(0,0)
return ans
}
|