POJ 3970 Party

Description

The CEO of ACM (Association of Cryptographic Mavericks) organization has invited all of his teams to the annual all-hands meeting, being a very disciplined person, the CEO decided to give a money award to
the first team that shows up to the meeting. 

The CEO knows the number of employees in each of his teams and wants to determine X the least amount of money he should bring so that he awards the first team to show up such that all team members receive the same amount of money. You must write a program to
help the CEO achieve this task.

Input

The input consists of multiple test cases, each test case is described on a line by itself, Each line starts with an integer N (1 <= N <= 20) the number of teams in the organization followed by N space separated
positive integers representing the number of employees in each of the N teams. You may assume that X will always fit in a 32 bit signed integer. The last line of input starts with 0 and shouldn't be processed.

Output

For each test case in the input print "The CEO must bring X pounds.", where X is as described above or "Too much money to pay!" if X is 1000000 or more. 

Sample Input

1 3000000
2 12 4
0

Sample Output

Too much money to pay!

The CEO must bring 12 pounds.

就是求个最大公倍数，注意判断超出的情况。
#include<set>
#include<map>
#include<ctime>
#include<cmath>
#include<stack>
#include<queue>
#include<bitset>
#include<cstdio>
#include<string>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<functional>
#define rep(i,j,k) for (int i = j; i <= k; i++)
#define per(i,j,k) for (int i = j; i >= k; i--)
#define loop(i,j,k) for (int i = j;i != -1; i = k[i])
#define lson x << 1, l, mid
#define rson x << 1 | 1, mid + 1, r
#define fi first
#define se second
#define mp(i,j) make_pair(i,j)
#define pii pair<int,int>
using namespace std;
typedef long long LL;
const int low(int x) { return x&-x; }
const double eps = 1e-4;
const int INF = 0x7FFFFFFF;
const int mod = 9973;
const int N = 3e5 + 10;
int n, x;

LL gcd(LL x, LL y)
{
return x%y ? gcd(y, x%y) : y;
}

int main()
{
while (scanf("%d", &n), n)
{
LL ans = 1;
while (n--)
{
scanf("%d", &x);
if (ans == -1) continue;
if (x >= 1000000) { ans = -1; continue; }
ans = ans / gcd(ans, x) * x;
if (ans >= 1000000) ans = -1;
}
if (ans == -1) puts("Too much money to pay!");
else printf("The CEO must bring %lld pounds.\n", ans);
}
return 0;
}