#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
int main(void)
{
    int asdf1,asdf2;
    scanf("%d",&asdf1);
    scanf("%d",&asdf2);
    if(asdf1*10==asdf2)
    {
        printf("Yes");
    }
    else
    {
        printf("No");
    }
    
}