hdu1019
The least common multiple (LCM) of a set of positive integers is the smallest positive integer which is divisible by all the numbers in the set. For example, the LCM of 5, 7 and 15 is 105.
Input
Input will consist of multiple problem instances. The first line of the input will contain a single integer indicating the number of problem instances. Each instance will consist of a single line of the form m n1 n2 n3 … nm where m is the number of integers in the set and n1 … nm are the integers. All integers will be positive and lie within the range of a 32-bit integer.
Output
For each problem instance, output a single line containing the corresponding LCM. All results will lie in the range of a 32-bit integer.
Sample Input
2
3 5 7 15
6 4 10296 936 1287 792 1
Sample Output
105
10296
由32-bit interg。知 这个题应该用long long,不然容易爆。
#include<stdio.h> int a(long long x,long long y) { int t; while(y != 0) { t = x%y; x = y; y = t; } return x; } int main() { int n,m,i; long long t,s; scanf("%d",&n); while(n--) { scanf("%d",&m); s = 1; for(i = 0; i<m; i++){ scanf("%lld",&t); s = (s*t)/a(s,t); } printf("%lld\n",s); } return 0; }