#include <unistd.h>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <utility>
#include <deque>
#include <iostream>
#include <algorithm>
#include <limits>
#include <cmath>
// using namespace std;
#define REP(i,n) for(int _n=(n), i=0;i<_n;++i)
#define FOR(i,a,b) for(int i=(a),_b=(b);i<=_b;++i)
#define FORD(i,a,b) for(int i=(a),_b=(b);i>=_b;--i)
#define TRACE(x) cerr << "TRACE(" #x ")" << endl;
#define DEBUG(x) cerr << #x << " = " << (x) << endl;
typedef long long LL;
typedef unsigned long long ULL;
using VINT = std::vector<int>;
using VLL = std::vector<LL>;
using VULL = std::vector<ULL>;
struct Range {
long from = 0;
long to = 0;
};
int main() {
std::ios_base::sync_with_stdio(false);
int i, n, b, c;
int ret = 0;
std::cin >> i;
for (int n = i; n > 2; n--) {
for (int a = n-1; a>1; a--) {
b = sqrt(n*n - a*a);
b = std::min(b, a);
for (; b>0; b--) {
int c = sqrt(n*n - a*a - b*b);
if (c == 0) continue;
if (c > b) break;
if (a*a + b*b + c*c != n*n) continue;
if (a == b || a == c || b == c) ret += 2;
else ret += 3;
}
}
}
std::cout << ret << 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 46 47 48 49 50 51 52 53 54 55 56 57 58 | #include <unistd.h> #include <string> #include <vector> #include <map> #include <set> #include <utility> #include <deque> #include <iostream> #include <algorithm> #include <limits> #include <cmath> // using namespace std; #define REP(i,n) for(int _n=(n), i=0;i<_n;++i) #define FOR(i,a,b) for(int i=(a),_b=(b);i<=_b;++i) #define FORD(i,a,b) for(int i=(a),_b=(b);i>=_b;--i) #define TRACE(x) cerr << "TRACE(" #x ")" << endl; #define DEBUG(x) cerr << #x << " = " << (x) << endl; typedef long long LL; typedef unsigned long long ULL; using VINT = std::vector<int>; using VLL = std::vector<LL>; using VULL = std::vector<ULL>; struct Range { long from = 0; long to = 0; }; int main() { std::ios_base::sync_with_stdio(false); int i, n, b, c; int ret = 0; std::cin >> i; for (int n = i; n > 2; n--) { for (int a = n-1; a>1; a--) { b = sqrt(n*n - a*a); b = std::min(b, a); for (; b>0; b--) { int c = sqrt(n*n - a*a - b*b); if (c == 0) continue; if (c > b) break; if (a*a + b*b + c*c != n*n) continue; if (a == b || a == c || b == c) ret += 2; else ret += 3; } } } std::cout << ret << std::endl; return 0; } |
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