a=(t,a,b=gets.split.map &:to_i
s=[""]*((s=t-b)%2)+[?<,?>]*(s/2)+[?>]*b
[:YES]+(0...t).map{|i|(i<a ? ?^:i>t-(t-a)%2?"":"^v"[(i-a)%2])+s[i]}
)rescue :NO
puts a