from sys import stdin

n = int(stdin.readline().rstrip())
data = stdin.readline().rstrip().split()
print(type(data))
s = str(data[0])
count_red, count_blue = 0,0
for i in range(len(s)):
    if s[i] == "R":
        count_red += 1
    else:
        count_blue += 1

if count_red > count_blue:
    print("Yes")
else:
    print("No")
