mirror of
https://github.com/halfrost/LeetCode-Go.git
synced 2025-07-04 08:02:30 +08:00
16 lines
236 B
Go
16 lines
236 B
Go
package leetcode
|
|
|
|
import (
|
|
"sort"
|
|
)
|
|
|
|
func sumSubseqWidths(A []int) int {
|
|
sort.Ints(A)
|
|
res, mod, n, p := 0, 1000000007, len(A), 1
|
|
for i := 0; i < n; i++ {
|
|
res = (res + (A[i]-A[n-1-i])*p) % mod
|
|
p = (p << 1) % mod
|
|
}
|
|
return res
|
|
}
|