1 #include<iostream>
 2
 
 #include<iomanip>
 3 //#include<bits/stdc++.h>
 4 #include<cstdio>
 5 #include<cmath>
 6 #include<sstream>
 7 #define PI  3.14159265358979
 8 #define LL long long
 9 #define  eps   0.00000001
10 #define LL long long
11 using namespace std;
12 LL gcd(LL a,LL b)
13 {
14     if
 
(a<b) swap(a,b);
15     LL r=a%b;
16     while(r)
17     {
18         a=b;
19         b=r;
20         r=a%b;
21     }
22     return b;
23 }
24 int main()
25 {
26    // freopen("input.txt","r",stdin);
27     LL T;
28     while(cin>>T)
29     {
30         LL a;
31         cin>>a;
 
32         LL temp=a;
33         for(LL i=2;i<=T;++i)
34         {
35             cin>>a;
36              temp=temp*a/gcd(temp,a);
37         }
38         cout<<temp<<endl;
39 
40     }
41 }

Lowest Common Multiple Plus