def main():
    N = int(input())
    S = input()
    R = 0
    B = 0
    for i in range(0,N):
        if S[i] == "R":
            R = R + 1
        else:
            B = B + 1
        if R > N/2:
            print("Yes")
            return
        elif B > N/2:
            print("No")
            return
    
if __name__ == '__main__':
    main()