#include <cstdint> #include <iostream> #include <set> #include <math.h> #include <stdint.h> using namespace std; int main() { int n; cin >> n; int ret = 0; int upper_bound; for (int i = 1; i <= n; i++) { for (int h = 1; h <= i; h++) { upper_bound = sqrt((i*i - h*h + 1)/2); for (int a = 1; a <= upper_bound; a++) { int b_square = i*i - a*a - h*h; float b = sqrt(b_square); if (b > 0 and b == floor(b)) { ret += 1; } } } } cout << ret << 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 | #include <cstdint> #include <iostream> #include <set> #include <math.h> #include <stdint.h> using namespace std; int main() { int n; cin >> n; int ret = 0; int upper_bound; for (int i = 1; i <= n; i++) { for (int h = 1; h <= i; h++) { upper_bound = sqrt((i*i - h*h + 1)/2); for (int a = 1; a <= upper_bound; a++) { int b_square = i*i - a*a - h*h; float b = sqrt(b_square); if (b > 0 and b == floor(b)) { ret += 1; } } } } cout << ret << endl; return 0; } |