var
x, y, p, year:integer;
Summ:real;
begin
readln(x);
readln(p);
readln(y);
Summ := x;
year := 0;
while Summ < y do
begin
Summ := (Trunc(Summ * (1 + p / 100) * 100)) / 100;
year := year + 1;
end;
writeln(year);
end.
// другой вариант
var
x, y, p, year, Summ:integer;
begin
readln(x);
readln(p);
readln(y);
Summ := x * 100;
year := 0;
while Summ < y * 100 do
begin
Summ := Trunc(Summ * (1 + p / 100));
year := year + 1;
end;
writeln(year);
end.