#include <iostream>
#include <cstdio>
#include <vector>
using namespace std;
vector < int > dividers( int n )
{
vector < int > result;
for ( int i = 1; i*i <= n; ++i )
{
if ( n % i == 0 )
{
result.push_back( i );
if ( i * i != n ) result.push_back( n / i );
}
}
return result;
}
int main()
{
int n, a, b, c;
long long answer;
vector < int > div, div2;
//while ( true )
{
answer = 0;
scanf( "%d", &n );
div = dividers( n );
for ( int i = 0; i < div.size(); ++i )
{
a = div[i];
div2 = dividers( n - a );
for ( int j = 0; j < div2.size(); ++j )
{
b = div2[j];
c = n - a - b;
if ( c % a == 0 && c % b == 0 && a < b && b < c )
{
answer++;
}
}
}
printf( "%lld\n", answer );
}
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | #include <iostream> #include <cstdio> #include <vector> using namespace std; vector < int > dividers( int n ) { vector < int > result; for ( int i = 1; i*i <= n; ++i ) { if ( n % i == 0 ) { result.push_back( i ); if ( i * i != n ) result.push_back( n / i ); } } return result; } int main() { int n, a, b, c; long long answer; vector < int > div, div2; //while ( true ) { answer = 0; scanf( "%d", &n ); div = dividers( n ); for ( int i = 0; i < div.size(); ++i ) { a = div[i]; div2 = dividers( n - a ); for ( int j = 0; j < div2.size(); ++j ) { b = div2[j]; c = n - a - b; if ( c % a == 0 && c % b == 0 && a < b && b < c ) { answer++; } } } printf( "%lld\n", answer ); } } |
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