1) var n:integer;begin readln(n); if(n<0)then write(0) else write(n+4);end.2) var
a, b: integer;
begin
readln(a, b);
if(a = b) then write(1)
else write(0);
end.3)var
a, b, c, s: integer;
begin
s := 0;
readln(a, b, c);
if(a >= 0) then s := s + 1;
if(b >= 0) then s := s + 1;
if(c >= 0) then s := s + 1;
write(s);
end.4) var
a, b, c, s: integer;
begin
s := 0;
readln(a, b, c);
if(a > 0) then s := s + a;
if(b > 0) then s := s + b;
if(c > 0) then s := s + c;
write(s);
end.5) var
a, b, c: integer;
begin
readln(a, b, c);
if (a < b) then swap(a, b);
if (a < c) then swap(a, c);
if (b < c) then swap(b, c);
write(a, ' ', b, ' ', c);
end.6) var
n, k, s, i: integer;
begin
s := 0;
readln(n, k);
for i := 1 to n.ToString.Length do
if(strtoint(n.ToString[i]) > k) then s := s + strtoint(n.ToString[i]);
write(s);
end.7) var
n, s, i: integer;
begin
s := 0;
readln(n);
for i := 1 to n do
s := s + i;
write(s);
end.9) var
n, i: integer;
begin
readln(n);
for i := n downto 1 do
write(i);
end.12 var
n, i: integer;
s: real;
begin
s := 0;
readln(n);
for i := n downto 1 do
s:=s+(0.1*i);
write(s);
end.13) var
n, i: integer;
begin
readln(n);
for i := 1 to n do
write(sqr(i), ' ');
end.14) var
n, i, c: integer;
begin
i := 1;
c := 0; readln(n);
while (c <> n) do
begin
if(i mod 3 = 0) then begin write(i, ' ');c := c + 1; end;
i := i + 1;
end;
end.15) var
n, i, a: integer;
c: real;
begin i := 1;
c := 0;
readln(n);
for i := 1 to n do begin
read(a);
c := c + a;
end;
write(c / n)
end.16) var
n, i, a: integer;
begin
i := 1;
while true do begin
read(a);
if(a = 0) then break;
n := n + 1;
end;
write(n)
end.