#include <stdio.h>

int main(void)
{
	int s, t;
	char c;

	scanf("%d %d %c", &s, &t, &c);

	if (c == '>') {
		if (s > t)
			printf("YES\n");
		else
			printf("NO\n");
	} else if (c == '<') {
		if (s < t)
			printf("YES\n");
		else
			printf("NO\n");
	} else {
		if (s == t)
			printf("YES\n");
		else
			printf("NO\n");
	}

	return 0;
}