#include <stdio.h>
#include<stdlib.h>
int main(void)
{
int x,y;
int n;
int a[100];
int i;
int z,q;
scanf("%d%d",&x,&y);
scanf("%d",&n);
for(i=0;i<n;i++){
	scanf("%d",&a[i]);
}
z=x/60/60*1000;
q=y/60/60*1000;
if(q-z<=10){
	
	printf("YES\n");
}else{
	
	printf("NO\n");
}

	return 0;
}