#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;
}
print('--- 1 ---')
b = float(input('Введите b: '))
a = b**3/9-6.4*(b+8)+3*b/4
print('a =', a)
print()
print('--- 2 ---')
a = float(input('Введите a: '))
b = float(input('Введите b: '))
d = a**3*b/7-2*a*b**2*(a+b)
print('d =', d)
print()
print('--- 3 ---')
a = float(input('Введите a: '))
b = float(input('Введите b: '))
q = (3*a**3-2*a*b+b**2)/(2*a*(3*a-b))
print('q =', q)
print()
print('--- 4 ---')
x = float(input('Введите x: '))
y = float(input('Введите y: '))
k = x**3-4*x*y*(x+y**2)
print('k =', k)
print()
print('--- 5 ---')
v = float(input('Введите v: '))
h = abs(v+1.7)*(2*v+3)
print('h =', h)
