Given the N integers, you have to find the maximum GCD (greatest common divisor) of every possible pair of these integers.
Input
The first line of input is an integer N (1 < N < 100) that determines the number of test cases. The following N lines are the N test cases. Each test case contains M (1 < M < 100) positive integers that you have to find the maximum of GCD.
Output
For each test case show the maximum GCD of every possible pair.
Sample Input
3 10 20 30 40
7 5 12
125 15 25
Sample Output
20 1 25
题意 :
要求一些数的最大公约数,此题的关键在于读入数据
#include<iostream>
#include<algorithm>
#include<cstring>
#include<string>
using namespace std;
int gcd(int a,int b)
{
return b==0?a:gcd(b,a%b);
}
int main()
{
int t;
scanf("%d",&t);
getchar();//避免跳行被读入
while(t--)
{
int a[110],sum=0,len=0,maxn=0;
char s;
while(1)
{
scanf("%c",&s);
if(s=='\n')
break;
if(s>='0'&&s<='9')
sum=sum*10+s-'0';
else
{
if(sum==0)//空格连续
continue;
if(sum!=0)
a[len++]=sum;
sum=0;
}
}
if(sum!=0)
a[len++]=sum;
for(int i=0;i<len;i++)
{
for(int j=i+1;j<len;j++)
{
maxn=max(maxn,gcd(a[i],a[j]));
}
}
printf("%d\n",maxn);
}
return 0;
}
#include<bits/stdc++.h>
using namespace std;
#define fst first
#define sec second
typedef long long LL;
typedef pair<int,int> P;
const int MAX_N = 510;
const int MAX_M = 10000;
int gcd (int a, int b) {
if (b == 0) return a;
return gcd(b,a % b);
}
int nums[110];
int main() {
int T;
cin>>T;
getchar();//避免跳行被读入
while (T--) {
char ch;
int num = 0;
int cnt = 0;
string str;
getline(cin, str);
stringstream stream(str);
while (stream >> nums[cnt]) cnt++;
int mg = 1;
for (int i = 0;i < cnt;i++) {
for (int j = i + 1;j < cnt;j++) {
mg = max(mg,gcd(nums[i],nums[j]));
}
}
printf("%d\n",mg);
}
}