Files ABC

var a,b,c:longint;
f1,f2:text;
begin
assign(f1, 'input.txt'); reset(f1);
assign(f2, 'output.txt'); rewrite(f2);
read(f1,a,b);
c:=a+b;
writeln(f2,c);
close(f1); close(f2);
end.