题解 | 自守数

package main

import (
	"fmt"
	"strconv"
	"strings"
)

func main() {
    var n int 
    fmt.Scan(&n)

    count := 0

    for i:=0;i<=n;i++ {
        s := strconv.Itoa(i*i)
        if strings.HasSuffix(s, strconv.Itoa(i)) {
            count++
        }
    }
    fmt.Println(count)
}