找新朋友
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 9382 Accepted Submission(s): 4969
#include<cstdio>
#include<cstring>
int euler(int n)//歐拉函數
{
int res=n,a=n,i;
for(i=2;i*i<=a;++i)
{
if(a%i==0)
res=res/i*(i-1);
while(a%i==0)
a/=i;
}
if(a>1) res=res/a*(a-1);
// printf("%d\n",a);
return res;
}
int main()
{
int a,n;
scanf("%d",&n);
while(n--)
{
scanf("%d",&a);
printf("%d\n",euler(a));
}
return 0;
}