import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); int x = in.nextInt(); int y = in.nextInt(); int pointstotal=0; for(int a0 = 0; a0 < n; a0++){ int latitude = in.nextInt(); int longitude = in.nextInt(); int height = in.nextInt(); int points = in.nextInt(); pointstotal+=points; } System.out.println(pointstotal); } }