#include <iostream> using namespace std; const int maxn = 5000; const int smaxn = maxn * maxn; int n, s_max, wynik, suma, h2, roznica, a2, d2; int czest[smaxn + 1] = {0}; int main() { ios_base::sync_with_stdio(0); cin.tie(0); cin >> n; s_max = n * n; for(int a = 1; a <= n; a++) { a2 = a * a; for (int b = a; b <= n; b++) { suma = a2 + b * b; if (suma > s_max) break; czest[suma]++; } } for (int d = 1; d <= n; d++) { d2 = d * d; for (int h = 1; h < d; h++) { h2 = h * h; roznica = d2 - h2; if(roznica <= s_max) { wynik += czest[roznica]; } } } cout << wynik << "\n"; }
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 <iostream> using namespace std; const int maxn = 5000; const int smaxn = maxn * maxn; int n, s_max, wynik, suma, h2, roznica, a2, d2; int czest[smaxn + 1] = {0}; int main() { ios_base::sync_with_stdio(0); cin.tie(0); cin >> n; s_max = n * n; for(int a = 1; a <= n; a++) { a2 = a * a; for (int b = a; b <= n; b++) { suma = a2 + b * b; if (suma > s_max) break; czest[suma]++; } } for (int d = 1; d <= n; d++) { d2 = d * d; for (int h = 1; h < d; h++) { h2 = h * h; roznica = d2 - h2; if(roznica <= s_max) { wynik += czest[roznica]; } } } cout << wynik << "\n"; } |