import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        double[] a = new double[n];
        int[] t = new int[n];
        int max = 0;
        for (int i = 0; i <n ; i++) {
            a[i] =sc.nextDouble();
            t[i] =sc.nextInt();
            if(a[i]*t[i]>max)
                max = (int)a[i]*t[i];
        }
        boolean[] light = new boolean[max+1];
        for (int i = 0; i <a.length ; i++) {
            for (int j =t[i]; j >=1 ; j--) {
                light[(int)(a[i]*j)] = !light[(int)(a[i]*j)];
            }
        }
        for (int i = 0; i <light.length ; i++) {
            if(light[i]==true)
                System.out.println(i);
        }
    }
}