BOJ2563.java

package ¹éÁØ;

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

public class BOJ2563 {
	static boolean[][] p = new boolean[101][101];
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st;
		int N = Integer.parseInt(br.readLine());
		int cnt = 0;
		
		for(int i = 0; i < N; i++) {
			st = new StringTokenizer(br.readLine());
			int x = Integer.parseInt(st.nextToken());
			int y = Integer.parseInt(st.nextToken());
			
			for(int j = x; j < x + 10; j++) {
				for(int k = y; k < y + 10; k++) {
					if(!p[k][j]) {
						p[k][j] = true;
						cnt++;
					}
				}
			}
		}
		System.out.print(cnt);
	}
}