#1001541 (C++23) No.2358 xy+yz+zx=N

• 問題: No.2358 xy+yz+zx=N
• ユーザー: momohara
• 提出日時: 2024-08-11 19:27:40
• 言語: C++23 (gcc 13.3.0 + boost 1.87.0)
• 結果: AC
• 実行時間: 66 ms / 2,000 ms
• コード長: 2,594 bytes
• コンパイル時間: 5,310 ms
• コンパイル使用メモリ: 322,748 KB
• 実行使用メモリ: 5,856 KB
• 最終ジャッジ日時: 2024-08-11 19:27:47
• 合計ジャッジ時間: 6,888 ms
• ジャッジサーバーID （参考情報）: judge2 / judge5

ファイルパターン	結果
sample	AC * 3
other	AC * 10

ソースコード

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#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
#ifdef DEBUG
#include "debug/all.hpp"
#else
#define debug(...) 42
#endif
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using P = pair<ll, ll>;
using tp = tuple<ll, ll, ll>;
template <class T>
using vec = vector<T>;
template <class T>
using vvec = vector<vec<T>>;
#define all(hoge) (hoge).begin(), (hoge).end()
#define en '\n'
#define rep(i, m, n) for(ll i = (ll)(m); i < (ll)(n); ++i)
#define rep2(i, m, n) for(ll i = (ll)(n)-1; i >= (ll)(m); --i)
#define REP(i, n) rep(i, 0, n)
#define REP2(i, n) rep2(i, 0, n)
constexpr long long INF = 1LL << 60;
constexpr int INF_INT = 1 << 30;
// constexpr long long MOD = (ll)1e9 + 7;
constexpr long long MOD = 998244353LL;
static const ld pi = 3.141592653589793L;
template <class T>
inline bool chmin(T &a, T b) {
    if(a > b) {
        a = b;
        return true;
    }
    return false;
}
template <class T>
inline bool chmax(T &a, T b) {
    if(a < b) {
        a = b;
        return true;
    }
    return false;
}
struct Edge {
    int to, rev;
    ll cap;
    Edge(int _to, int _rev, ll _cap) : to(_to), rev(_rev), cap(_cap) {}
};
typedef vector<Edge> Edges;
typedef vector<Edges> Graph;
void add_edge(Graph &G, int from, int to, ll cap, bool revFlag, ll revCap) {
    G[from].push_back(Edge(to, (int)G[to].size(), cap));
    if(revFlag)
        G[to].push_back(Edge(from, (int)G[from].size() - 1, revCap));
}
void solve() {
    ll n;
    cin >> n;
    // x>=y>=zの前提でとく
    vvec<ll> ans;
    for(ll y = 1; y * y <= n; y++) {
        if(n % y == 0) {
            ll x = n / y;
            ll z = 0;
            vec<ll> d({z, y, x});
            do {
                ans.push_back(d);
            } while(next_permutation(all(d)));
        }
        for(ll z = 1; z <= y; z++) {
            ll a = n - y * z;
            ll b = y + z;
            if(a % b)
                continue;
            ll x = a / b;
            if(x < y)
                continue;
            vec<ll> d({z, y, x});
            do {
                ans.push_back(d);
            } while(next_permutation(all(d)));
        }
    }
    sort(all(ans));
    cout << ans.size() << en;
    for(auto i : ans) {
        for(auto j : i)
            cout << j << " ";
        cout << en;
    }
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    // cout << fixed << setprecision(10);
    // ll t;
    // cin >> t;
    // REP(i, t - 1) {
    //     solve();
    // }
    solve();
    return 0;
}
 
 
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