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#include <iostream>
using namespace std;
long int gcd(long a, long b)
{
long res;
while(b)
{
res = b;
b = a % b;
a = res;
}
return res;
}
long mcm(long a, long b)
{
return (a / gcd(a, b))*b;
}
int main()
{
int n;
long a;
long b;
while(1)
{
cin >> n;
if(n)
{
if(n == 1)
{
cin >> a;
cout << a << endl;
continue;
}
cin >> a;
for(int i = 0; i < n-1; i++)
{
cin >> b;
a = mcm(a,b);
}
cout << a << endl;
}
else
{
return 0;
}
}
}
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