hdu 1019 最小公倍数

简单题 注意__int64 的使用

Problem : 1019 ( Least Common Multiple )     Judge Status : Accepted
RunId : 10599776    Language : C++    Author : xiaoniuwin
Code Render Status : Rendered By HDOJ C++ Code Render Version 0.01 Beta

#include<iostream>
using namespace std;
__int64 f(__int64 a,__int64 b)
{
    __int64 t;
    __int64 sum=a*b;
    if(a<b)
    {
        t=a;
        a=b;
        b=t;
    }
    while(b)
    {
        t=a%b;
        a=b;
        b=t;
    }
    return sum/a;
}
int main()
{
    int t,n;
    __int64 x;
    __int64 lcm;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d",&n);
        scanf("%I64d",&lcm);
        n--;
        while(n--)
        {
            scanf("%I64d",&x);
            lcm=f(lcm,x);
        }
        printf("%I64d\n",lcm);
    }
    return 0;
}