백준 25784 자바 - Easy-to-Solve Expressions

// Easy-to-Solve Expressions
package Bronze_IV_4;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Ex25784 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());

        int a = Integer.parseInt(st.nextToken());
        int b = Integer.parseInt(st.nextToken());
        int c = Integer.parseInt(st.nextToken());

        if(a + b == c || a + c == b || b + c == a) {
            System.out.println(1);
        }else if(a * b == c || a * c == b || b * c == a) {
            System.out.println(2);
        }else {
            System.out.println(3);
        }
    }
}