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1065. 한수 - Useful Blog

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1065. 한수

written by Useful·BOJ 1065


c
#include <bits/stdc++.h>

using namespace std;

bool isHansoo(int num){
    int num1 = num / 100;
    int num2 = num % 100 / 10;
    int num3 = num % 10

;

if

(

num1

-

num2

==

num2

-

num3

)

{

return

true

;

}

return

false

;

}

int

main

(

)

{

cin

.

tie

(

NULL

)

;

cout

.

tie

(

NULL

)

;

ios_base

::

sync_with_stdio

(

0

)

;

int

N

;

cin

>>

N

;

int

count

=

0

;

for

(

int

i

=

1

;

i

<=

N

;

i

++

)

{

if

(

i

<

100

)

{

count

++

;

}

else

if

(

i

<

1000

&&

isHansoo

(

i

)

)

{

count

++

;

}

}

cout

<<

count

;

}

```