heyuntian1022 2008-03-05 20:29:00
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PROGRAM P1291;
VAR
LA,LB,I,C,ANS:INTEGER;
A:ARRAY [1..2000] OF INTEGER;
B:ARRAY [0..300] OF INTEGER;
BEGIN
READLN(LA,LB);
FILLCHAR(B,SIZEOF(B),0);
B[0]:=MAXINT;
FOR I:=1 TO LA DO READLN(A[I]);
FOR I:=1 TO LB DO
BEGIN
READLN(C);
IF C<>0 THEN INC(B[C]);
END;
ANS:=LB;
FOR I:=1 TO LA DO
BEGIN
C:=A[I]-1;
WHILE B[C]=0 DO DEC(C);
IF C>0 THEN
BEGIN
DEC(B[C]);
DEC(ANS);
END;
ENd;
writeln(ans);
end.