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1582f1.go
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/
1582f1.go
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// 00
package main
import (
"bufio"
"fmt"
"os"
)
func write(f *bufio.Writer, a ...interface{}) {
f.Write([]byte(fmt.Sprint(a...)))
}
type Number interface {
int64 | float64 | int
}
func min[K Number](a K, b K) K {
if a < b {
return a
}
return b
}
func max[K Number](a K, b K) K {
if a > b {
return a
}
return b
}
func main() {
var n int
reader := bufio.NewReader(os.Stdin)
f := bufio.NewWriter(os.Stdout)
defer f.Flush()
fmt.Fscan(reader, &n)
a := make([]int, n)
for i := 0; i < n; i++ {
fmt.Fscan(reader, &a[i])
}
m := make([]int, 1024)
for i := 0; i < 1024; i++ {
m[i] = 1000
}
for i := 0; i < n; i++ {
m[a[i]] = min(m[a[i]], a[i])
for j := 0; j < 1024; j++ {
if m[j] < a[i] {
nxt := j ^ a[i]
m[nxt] = min(m[nxt], a[i])
}
}
}
ans := make([]int, 1)
for i := 1; i < 1024; i++ {
if m[i] != 1000 {
ans = append(ans, i)
}
}
//sort.Ints(ans)
write(f, len(ans), "\n")
for i := 0; i < len(ans); i++ {
write(f, ans[i], " ")
}
write(f, "\n")
}