https://www.acmicpc.net/problem/2480
if-else 문 사용
가장 큰 값은 Math.max(a,b)사용
import java.util.Scanner;
public class Main{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
int b = sc.nextInt();
int c = sc.nextInt();
sc.close();
if(a == b && b == c && a == c) System.out.println(10000 + (a*1000));
else if(a == b || a == c || b == c){
if(a == b) System.out.println(1000 + (a*100));
else if(a == c) System.out.println(1000 + (a*100));
else if(c == b) System.out.println(1000 + (c*100));
}
else System.out.println(Math.max(a,Math.max(b, c)) *100);
}
}