백준 2163 Java 자바

초콜릿을 전부 1x1로 쪼개기 위한 횟수는 (n-1) + n * (m-1)이다.

 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
 
public class Q2163 {
 
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int n = Integer.parseInt(st.nextToken());
        int m = Integer.parseInt(st.nextToken());
        
        int result = (n-1) + n * (m-1);
        System.out.println(result);
 
    }
 
}