题解 | #密码验证合格程序#

package main


import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

func main() {
	in := bufio.NewScanner(os.Stdin)
	for in.Scan() {
		if check(in.Text()) {
			fmt.Println("OK")
		} else {
			fmt.Println("NG")
		}
	}
}

func check(str string) bool {
	if len(str) <= 8 {
		return false
	}

	var c1, c2, c3, c4 int
	for _, s := range str {
		if s >= 'a' && s <= 'z' {
			c1 = 1
		} else if s >= 'A' && s <= 'Z' {
			c2 = 1
		} else if s >= '0' && s <= '9' {
			c3 = 1
		} else {
			c4 = 1
		}
	}
	if c1+c2+c3+c4 < 3 {
		return false
	}

	for i := 0; i < len(str)-2; i++ {
		if len(strings.Split(str, str[i:i+3])) >= 3 {
			return false
		}
	}

	return true
}