[백준] 1065번 : 한수 - C

https://www.acmicpc.net/problem/1065

#include<stdio.h>
int main() {
    int x;
    scanf("%d",&x);
    int count=99;
    if(x<100) printf("%d",x);
    else{
        for(int i=100;i<=x;i++){
            int a=i%10;
            int b=(i/10)%10;
            int c=(i/10)/10;
            if(c-b==b-a) count++;
        }
        printf("%d",count);
    }
}