zoj 1797 Least Common Multiple

zoj 1797 Least Common Multiple

#include <stdio.h>#include <stdlib.h>#include <iostream>#include <memory.h>#define MAX 10001using namespace std;long long int gcd(long long int x,long long int y){return y == 0? x : gcd(y,x%y);}int main(void){int num[MAX];int ncases,n;scanf("%d",&ncases);while( ncases -- ){scanf("%d",&n);for(int i=0; i<n; i++)scanf("%d",&num[i]);if( n == 1 ){printf("%dn",num[0]);continue;}int temp = gcd(num[0],num[1]);if(temp == 0 ){printf("%dn",temp);continue;}temp = num[0]/temp*num[1];for(int i=2; i<n; i++){int x = gcd(temp,num[i]);if( x == 0 ){temp = 0;break;}temp = temp/x*num[i];}printf("%dn",temp);}    return 0;}