Python学习

# 题目1439：Least Common Multiple WA解决

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 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.

For each problem instance, output a single line containing the corresponding LCM. All results will lie in the range of a 32-bit integer.

2
3 5 7 15
6 4 10296 936 1287 792 1

105
10296

WA半天，做到怀疑人生，最终花了我20个豆子解决，题目要求lie in the range of 32-bit integer.int是到2^32-1。int不够，要longlong才行。真的一个-1没看清，浪费了好多时间。

#include<stdio.h>
int lcm(long long a,long long b){
long long m=a,n=b;
while(b!=0){
long long t=a%b;
a=b;
b=t;
}
return m*n/a;
}
int main(){
int n,m;
long long a,b;
while(scanf("%d",&n)!=EOF){
while(n-->0){
scanf("%d%lld",&m,&a);
for(int i=1;i<m;i++){
scanf("%lld",&b);
a=lcm(a,b);
}
printf("%d\n",a);
}
}
return 0;
}
/**************************************************************
Problem: 1439
User: WZDCJ0206
Language: C++
Result: Accepted
Time:0 ms
Memory:1020 kb
****************************************************************/
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