//by Michal Gilski
#include <cstdlib>
#include <cstdio>
#include <vector>
#include <deque>
using namespace std;
int ipow(int base, int exp)
{
int result = 1;
for (;;)
{
if (exp & 1)
result *= base;
exp >>= 1;
if (!exp)
break;
base *= base;
}
return result;
}
int czynnrekur(vector<pair<int,int> > &v, vector<int> &wyn, int k, int suma, int n)
{
if(k == v.size())
{
if(suma != 1 && suma!=n)
wyn.push_back(suma);
return 0;
}
pair<int, int> p = v[k];
for (int i = 0; i <= p.second; ++i)
{
czynnrekur(v, wyn, k+1, suma * ipow(p.first, i), n);
}
}
vector<pair<int,int> > czynniki_pierw (int a)
{
int k = 2;
int l;
vector<pair<int,int> > v;
while(a > 1)
{
if (!(a%k))
{
l = 0;
while(!(a%k) && a > 1)
{
a/=k;
l++;
}
if(k > 1)v.push_back(pair<int,int> (k,l));
}
else k++;
if(k*k > a)
{
if(a > 1)v.push_back(pair<int,int> (a,1));
break;
}
}
return v;
}
vector<int> czynniki2(int a)
{
vector<pair<int,int> > v;
v = czynniki_pierw(a);
vector<int> w;
czynnrekur(v, w, 0, 1, a);
return w;
}
int main(int argc, char const *argv[])
{
int n;
scanf("%d", &n);
vector<int> w;
w = czynniki2(n);
w.push_back(1);
int a,k;
int wynik = 0;
for (int i = 0; i < w.size(); ++i)
{
a = w[i];
if (n/a > 6)
{
k = n/a - 1;
vector<int> dx = czynniki2(k);
if(dx.size() && k%2 == 0) wynik--;
wynik += dx.size();
}
}
printf("%d\n",wynik );
return 0;
}
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 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | //by Michal Gilski #include <cstdlib> #include <cstdio> #include <vector> #include <deque> using namespace std; int ipow(int base, int exp) { int result = 1; for (;;) { if (exp & 1) result *= base; exp >>= 1; if (!exp) break; base *= base; } return result; } int czynnrekur(vector<pair<int,int> > &v, vector<int> &wyn, int k, int suma, int n) { if(k == v.size()) { if(suma != 1 && suma!=n) wyn.push_back(suma); return 0; } pair<int, int> p = v[k]; for (int i = 0; i <= p.second; ++i) { czynnrekur(v, wyn, k+1, suma * ipow(p.first, i), n); } } vector<pair<int,int> > czynniki_pierw (int a) { int k = 2; int l; vector<pair<int,int> > v; while(a > 1) { if (!(a%k)) { l = 0; while(!(a%k) && a > 1) { a/=k; l++; } if(k > 1)v.push_back(pair<int,int> (k,l)); } else k++; if(k*k > a) { if(a > 1)v.push_back(pair<int,int> (a,1)); break; } } return v; } vector<int> czynniki2(int a) { vector<pair<int,int> > v; v = czynniki_pierw(a); vector<int> w; czynnrekur(v, w, 0, 1, a); return w; } int main(int argc, char const *argv[]) { int n; scanf("%d", &n); vector<int> w; w = czynniki2(n); w.push_back(1); int a,k; int wynik = 0; for (int i = 0; i < w.size(); ++i) { a = w[i]; if (n/a > 6) { k = n/a - 1; vector<int> dx = czynniki2(k); if(dx.size() && k%2 == 0) wynik--; wynik += dx.size(); } } printf("%d\n",wynik ); return 0; } |
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