hdu 1019 Least Common Multiple
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Least Common Multiple
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 52181 Accepted Submission(s): 19805
Problem Description
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
23 5 7 156 4 10296 936 1287 792 1
Sample Output
10510296题目解析:这个题就是让求几个数的最小公倍数,首先我们要对数列进行排序,找到最大值,开始向上增大,每次增大最大的数,用循环就可以找到最小公倍数代码:#include <stdio.h>#include <string.h>#include <math.h>#include <algorithm>using namespace std;int main(){ int t,s,n,i,j,m,a[5000]; scanf("%d",&t); while(t--) { scanf("%d",&n); for(i=0;i<n;i++) scanf("%d",&a[i]); sort(a,a+n); for(i=a[n-1];;i+=a[n-1]) { for(j=0;j<n-1;j++) if(i%a[j]!=0) break; if(j==n-1) break; } printf("%d\n",i); } return 0;}
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