# The read4 API is already defined for you. # @param buf, a list of characters # @return an integer # def read4(buf): class Solution: # @param buf, Destination buffer (a list of characters) # @param n, Maximum number of characters to read (an integer) # @return The number of characters read (an integer) def read(self, buf, n): seg = read4(buf) if seg < 4: return seg
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