#include <cmath>
#include <iostream>
#define LOG(_x_) //std::cerr << _x_ << std::endl
#define TRC(_x_) //LOG(_x_)
void calc(int &count, int a, int n) {
for (int j = a * 2; j <= n - a - j; j += a) {
int sk = n - a - j * 2;
int ek = n - a - j;
if (ek >= j * 2) {
if ((ek % j) != 0) {
ek = ek / j + j;
}
LOG("K:" << sk);
for (int k = ek; k > sk; k -= j) {
TRC(a << ", " << j << ", " << k);
if ((k > j) && a + j + k == n) {
LOG("F:" << a);
count++;
}
}
}
}
}
int main() {
int n;
std::ios_base::sync_with_stdio(false);
std::cin >> n;
int count = 0;
int sqn = sqrt(n);
for (int i = 1; i <= sqn; ++i) {
if ((n % i) == 0) {
int a1 = i;
int a2 = n / i;
LOG("A1:" << a1 << ", A2:" << a2);
calc(count, a1, n);
calc(count, a2, n);
}
}
std::cout << count << std::endl;
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 | #include <cmath> #include <iostream> #define LOG(_x_) //std::cerr << _x_ << std::endl #define TRC(_x_) //LOG(_x_) void calc(int &count, int a, int n) { for (int j = a * 2; j <= n - a - j; j += a) { int sk = n - a - j * 2; int ek = n - a - j; if (ek >= j * 2) { if ((ek % j) != 0) { ek = ek / j + j; } LOG("K:" << sk); for (int k = ek; k > sk; k -= j) { TRC(a << ", " << j << ", " << k); if ((k > j) && a + j + k == n) { LOG("F:" << a); count++; } } } } } int main() { int n; std::ios_base::sync_with_stdio(false); std::cin >> n; int count = 0; int sqn = sqrt(n); for (int i = 1; i <= sqn; ++i) { if ((n % i) == 0) { int a1 = i; int a2 = n / i; LOG("A1:" << a1 << ", A2:" << a2); calc(count, a1, n); calc(count, a2, n); } } std::cout << count << std::endl; return 0; } |
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