#include <iostream>
typedef long long ll;
using namespace std;
bool ll_is_valid(ll t, ll N, ll x, ll y)
{
return t / x + (t - x) / y >= N;
}
ll f(ll N, ll x, ll y)
{
ll R = 1;
while (!ll_is_valid(R,N,x,y)) R *= 2;
ll L = R / 2;
while(R - L > 1)
{
ll M = (L + R) / 2;
if (!ll_is_valid(M,N,x,y)) {L = M;}
else {R = M;}
}
return R;
}
int main()
{
ll N,x,y;
cin >> N >> x >> y;
if(x > y) swap( x, y );
cout << f(N, x, y) << std::endl;
}
var
n, i, sum, pr: integer;
begin
Writeln('Введите число: ');
Readln(n);
pr := 1;
while n <> 0 do
begin
i := n mod 10;
if i mod 2 <> 0 then sum += i else pr *= i;
n := n div 10
end;
Writeln('Сумма нечетных цифр: ', sum);
Writeln('Произведение четных цифр: ', pr);
end.