HDU 1019 Least Common Multiple

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 using namespace std;
 5 int Common(int a, int b) {
 6     int t = (a < b )? a : b;
 7     while(t > 0) {
 8         if(a % t == 0 && b % t == 0)
 9             break;
10         t --;
11     }
12     return t;
13 }
14 
15 int main()
16 {
17 
18     freopen("C:\\Users\\super\\Documents\\CB_codes\\in.txt", "r", stdin);
19     //freopen("C:\\Users\\super\\Documents\\CB_codes\\out.txt","w",stdout);
20     int T, n;
21     long long int a, b;
22     scanf("%d", &T);
23     while(T --) {
24         scanf("%d", &n);
25         b = 1;
26         for(int i = 0; i < n; i ++) {
27             scanf("%I64d", &a);
28             b = b * a / Common(a, b);
29         }
30 
31         printf("%I64d\n", b);
32     }
33 
34 
35     fclose(stdin);
36     return 0;
37 }