import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		int[] xa = new int[n];
		int[] ya = new int[n];
		int[] xb = new int[n];
		int[] yb = new int[n];
		for (int i = 0; i < n; i++) {
			String[] sa = br.readLine().split(" ");
			xa[i] = Integer.parseInt(sa[0]) + 20000;
			ya[i] = Integer.parseInt(sa[1]) + 20000;
			xb[i] = Integer.parseInt(sa[2]) + 19999;
			yb[i] = Integer.parseInt(sa[3]) + 19999;
		}
		br.close();

		boolean[][] g = new boolean[40000][40000];
		PrintWriter pw = new PrintWriter(System.out);
		for (int i = 0; i < n; i++) {
			int ans = 0;
			for (int j = xa[i]; j <= xb[i]; j++) {
				for (int j2 = ya[i]; j2 <= yb[i]; j2++) {
					if (!g[j][j2]) {
						g[j][j2] = true;
						ans++;
					}
				}
			}
			pw.println(ans);
		}
		pw.flush();
	}
}