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Cod sursa(job #467936)
program ratphu;
var f, g:text;
i, x, p, n, j, k, r:longint;
nr:array[0..262150,0..20] of longint;
v:array[1..20] of longint;
procedure citire;
begin
read(f,x,p);
while x>0 do
begin
n:=n+1;
v[n]:=x mod 10;
x:=x div 10;
end;
end;
procedure rezolvare;
begin
nr[0,0]:=1;
for i:=0 to 1 shl n-1 do
for j:=0 to p-1 do
if nr[i,j]>0 then
for k:=0 to n-1 do
if i and (1 shl k)=0 then
begin
x:=i or (1 shl k);
r:=(j*10+v[k+1]) mod p;
nr[x,r]:=nr[x,r]+nr[i,j];
end;
writeln(g,nr[1 shl n-1,0]);
end;
begin
assign(f,'ratphu.in'); reset(f);
assign(g,'ratphu.out'); rewrite(g);
citire;
rezolvare;
close(f);
close(g);
end.