25304_영수증

import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int X = sc.nextInt(); int N = sc.nextInt(); for (int i = 0; i < N; i++) { int a = sc.nextInt(); int b = sc.nextInt(); X -= (a * b); } if (X == 0) { System.out.println("Yes"); } else { System.out.println("No"); } } }