+# Function compatibility
+# xrange, raw_input, map ,unicde
+if sys.version[0] == "2":
+ lmap = lambda f, a: map(f, a)
+ str2u = lambda x: x.decode('utf-8')
+ u2str = lambda x: x.encode('utf-8')
+else:
+ xrange = range
+ raw_input = input
+ lmap = lambda f, a: list(map(f, a))
+ str2u = u2str = lambda x: x