LCM Cardinality
http://acm.hust.edu.cn/vjudge/contest/view.action?cid=31675#problem/E
暴力
// File Name: uva10892.cpp
// Author: bo_jwolf
// Created Time: 2013年09月16日 星期一 22:32:26 #include<vector>
#include<list>
#include<map>
#include<set>
#include<deque>
#include<stack>
#include<bitset>
#include<algorithm>
#include<functional>
#include<numeric>
#include<utility>
#include<sstream>
#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cmath>
#include<cstdlib>
#include<cstring>
#include<ctime> using namespace std; vector<int> Q ;
long long n ; long long gcd( long long a , long long b )
{
return b == 0 ? a : gcd( b , a % b ) ;
} long long lcm( long long a , long long b )
{
return ( 1LL*a * b ) / gcd( a , b ) ;
} int main()
{
while( scanf( "%lld" , &n ) != EOF )
{
if( n == 0 )
break ;
Q.clear() ;
for( long long i = 1 ; i <= sqrt( n ) ; ++i )
{
if( n % i == 0 )
{
if( n / i != i )
{
Q.push_back( n / i ) ;
Q.push_back( i ) ;
}
else
{
Q.push_back( i ) ;
}
}
}
long long len = Q.size() ;
long long ans = 1 ;
for( long long i = 0 ; i < len ; ++i )
{
for( long long j = i + 1 ; j < len ; ++j )
{
if( lcm( Q[ i ] , Q[ j ] ) == n )
ans++ ;
}
}
printf( "%lld %lld\n" , n , ans ) ;
}
return 0;
}
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