OJ-Problems-Source/HDOJ/3826_autoAC.cpp
2016-09-04 14:17:41 +08:00

59 lines
1.3 KiB
C++

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int hash[500024]={0};
int prime( int num[] )
{
for( int i=3;i<=1000;i+=2 )
{
if( hash[i/2] )
continue;
int x=i<<1;
for( int j=i*i; j<=1000000; j+=x )
hash[j/2]=1;
}
int count=0;
num[++count]=2;
for( int i=1;i<=500000;i++ )
{
if( hash[i]==0 )
num[++count]=( i<<1 )+1;
}
return count;
}
bool judge( int num[], int count , long long number )
{
long long t=( long long )sqrt( number ) ;
for( int i=1;i<=count; i++ )
{
if( number==1 ) break;
if( 0==(number%num[i]) )
{
number/=num[i];
if( number%num[i]==0 ) return true;
}
}
if( number!=1 )
{
t=( long long )sqrt( number ) ;
if( (t*t)==number )
return true;
}
return false;
}
int main( )
{
int T,num[78550];
int count = prime( num );
scanf( "%d",&T );
for( int i=1;i<=T; i++ )
{
long long number;
scanf( "%I64d",&number );
printf( "Case %d: ",i );
bool t=judge( num,count,number );
printf( t?"No\n":"Yes\n" );
}
return 0;
}