제출 코드
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package bronze;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class B2563_colorPaper {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int SIZE = 100;
int N = sc.nextInt();
boolean[][] arr = new boolean[SIZE][SIZE];
int x, y;
for(int n=0; n<N; n++) {
x = sc.nextInt()-1;
y = sc.nextInt()-1;
for(int i=x; i<x+10; i++) { //색종이 붙이기
for(int j=y; j<y+10; j++) {
arr[i][j] = true;
}
}
}
int count = 0;
for(int i=0; i<SIZE; i++) { //붙은 면적 세기
for(int j=0; j<SIZE; j++) {
if(arr[i][j]) count++;
}
}
System.out.println(count);
}
}