uses crt;
var f,k:byte;
begin
clrscr;
for f:=0 to 15 do
for k:=0 to 15-f do
if (f*2+k*4=42)and(f+k=15) then
writeln('f=',f,' k=',k);
readln
end.
uses crt;
var f,k:byte;
begin
clrscr;
for f:=0 to 15 do
for k:=0 to 15-f do
if (f*2+k*4=42)and(f+k=15) then
writeln('f=',f,' k=',k);
readln
end.