这个笔试是春招还是实习啊？ 另外有没有大佬帮我看看，只有27% func swapChar(s string) string { stack := make([]int, 0) for i := range s { for len(stack) > 0 && s[i] < s[stack[len(stack)-1]] { stack = stack[:len(stack)-1] } stack = append(stack, i) } b := []byte(s) for i := range stack { if i != stack[i] { b[i], b[stack[i]] = b[stack[i]], b[i] break } } return string(b) }