結果
| 問題 |
No.2358 xy+yz+zx=N
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-09-23 15:42:48 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,492 bytes |
| コンパイル時間 | 1,919 ms |
| コンパイル使用メモリ | 209,308 KB |
| 最終ジャッジ日時 | 2025-02-17 01:44:29 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 9 WA * 1 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <typename T>
using min_priority_queue = priority_queue<T, vector<T>, greater<T>>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using Graph = vector<vector<int>>;
const ll INF = 1LL << 60;
template <class T>
void chmax(T& a, T b) {
if (b > a) a = b;
}
template <class T>
void chmin(T& a, T b) {
if (b < a) a = b;
}
template <typename T, typename S>
std::ostream& operator<<(std::ostream& os, const pair<T, S>& x) noexcept {
return os << "(" << x.first << ", " << x.second << ")";
}
template <typename T>
void print_vector(vector<T> a) {
cout << '[';
for (int i = 0; i < a.size(); i++) {
cout << a[i];
if (i != a.size() - 1) {
cout << ", ";
}
}
cout << ']' << endl;
}
struct triple {
ll first, second, third;
bool operator<(const triple& other) const {
if (first != other.first) return first < other.first;
if (second != other.second) return second < other.second;
return third < other.third;
}
};
void solve() {
ll N;
cin >> N;
ll M = int(sqrt((double)N / (double)3)) + 10;
// std::cout << M << "\n";
vector<vector<ll>> tmp;
for (ll x = 0; x <= M; x++) {
ll y = x + 1;
while (true) {
if (N - x * y < 0 || (x == 0 && y > N)) break;
if ((N - x * y) % (x + y) != 0) {
y++;
continue;
}
ll z = (N - x * y) / (x + y);
// std::cout << x << ' ' << y << ' ' << z << "\n";
vector<ll> vec;
vec.push_back(x);
vec.push_back(y);
vec.push_back(z);
tmp.push_back(vec);
y++;
}
}
set<vector<ll>> rets;
for (auto& v : tmp) {
vector<int> indices;
for (int i = 0; i < 3; i++) {
indices.push_back(i);
}
do {
vector<ll> u;
for (int i = 0; i < 3; i++) {
u.push_back(v[indices[i]]);
}
rets.insert(u);
} while (next_permutation(indices.begin(), indices.end()));
}
std::cout << rets.size() << "\n";
for (auto& v : rets) {
for (auto& u : v) {
std::cout << u << " ";
}
std::cout << "\n";
}
}
int main() {
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
int T = 1;
while (T--) {
solve();
}
return 0;
}