結果
問題 | No.1207 グラフX |
ユーザー | theory_and_me |
提出日時 | 2020-08-30 15:08:36 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 232 ms / 2,000 ms |
コード長 | 5,849 bytes |
コンパイル時間 | 2,794 ms |
コンパイル使用メモリ | 219,312 KB |
実行使用メモリ | 37,544 KB |
最終ジャッジ日時 | 2024-11-15 08:36:53 |
合計ジャッジ時間 | 11,053 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 155 ms
24,380 KB |
testcase_01 | AC | 159 ms
24,392 KB |
testcase_02 | AC | 158 ms
24,268 KB |
testcase_03 | AC | 163 ms
24,396 KB |
testcase_04 | AC | 161 ms
24,380 KB |
testcase_05 | AC | 227 ms
37,336 KB |
testcase_06 | AC | 232 ms
37,544 KB |
testcase_07 | AC | 220 ms
37,484 KB |
testcase_08 | AC | 128 ms
18,288 KB |
testcase_09 | AC | 131 ms
21,172 KB |
testcase_10 | AC | 206 ms
32,012 KB |
testcase_11 | AC | 212 ms
37,368 KB |
testcase_12 | AC | 128 ms
18,744 KB |
testcase_13 | AC | 68 ms
10,752 KB |
testcase_14 | AC | 157 ms
23,600 KB |
testcase_15 | AC | 141 ms
20,228 KB |
testcase_16 | AC | 67 ms
10,880 KB |
testcase_17 | AC | 99 ms
16,160 KB |
testcase_18 | AC | 84 ms
15,056 KB |
testcase_19 | AC | 99 ms
14,592 KB |
testcase_20 | AC | 158 ms
23,988 KB |
testcase_21 | AC | 12 ms
6,820 KB |
testcase_22 | AC | 104 ms
16,272 KB |
testcase_23 | AC | 110 ms
17,820 KB |
testcase_24 | AC | 74 ms
13,780 KB |
testcase_25 | AC | 158 ms
23,668 KB |
testcase_26 | AC | 129 ms
18,952 KB |
testcase_27 | AC | 148 ms
21,896 KB |
testcase_28 | AC | 144 ms
21,356 KB |
testcase_29 | AC | 141 ms
21,316 KB |
testcase_30 | AC | 71 ms
11,848 KB |
testcase_31 | AC | 60 ms
9,472 KB |
testcase_32 | AC | 59 ms
11,292 KB |
testcase_33 | AC | 66 ms
11,476 KB |
testcase_34 | AC | 135 ms
19,732 KB |
testcase_35 | AC | 13 ms
6,816 KB |
testcase_36 | AC | 139 ms
20,604 KB |
testcase_37 | AC | 117 ms
17,268 KB |
testcase_38 | AC | 31 ms
7,040 KB |
testcase_39 | AC | 65 ms
12,528 KB |
testcase_40 | AC | 46 ms
8,064 KB |
testcase_41 | AC | 90 ms
14,136 KB |
testcase_42 | AC | 2 ms
6,820 KB |
testcase_43 | AC | 2 ms
6,820 KB |
testcase_44 | AC | 2 ms
6,820 KB |
testcase_45 | AC | 142 ms
24,732 KB |
testcase_46 | AC | 153 ms
24,252 KB |
testcase_47 | AC | 152 ms
24,336 KB |
testcase_48 | AC | 155 ms
24,380 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define REP(i,n) for(ll i=0;i<(ll)n;i++) #define dump(x) cerr << #x << " = " << (x) << endl; #define spa << " " << #define fi first #define se second #define ALL(a) (a).begin(),(a).end() #define ALLR(a) (a).rbegin(),(a).rend() using ld = long double; using ll = long long; using ull = unsigned long long; using pii = pair<int, int>; using pll = pair<long, long>; using pdd = pair<ld, ld>; template<typename T> struct V : vector<T> { using vector<T>::vector; }; V() -> V<ll>; V(size_t) -> V<ll>; template<typename T> V(size_t, T) -> V<T>; template<typename T> vector<T> make_vec(size_t n, T a) { return vector<T>(n, a); } template<typename... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec(ts...))>(n, make_vec(ts...)); } template<class S, class T> ostream& operator << (ostream& os, const pair<S, T> v){os << "(" << v.first << ", " << v.second << ")"; return os;} template<typename T> ostream& operator<<(ostream &os, const vector<T> &v) { for (auto &e : v) os << e << ' '; return os; } template<class T> ostream& operator<<(ostream& os, const vector<vector<T>> &v){ for(auto &e : v){os << e << "\n";} return os;} struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; } template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; } void fail() { cout << -1 << '\n'; exit(0); } inline int popcount(const int x) { return __builtin_popcount(x); } inline int popcount(const ll x) { return __builtin_popcountll(x); } template<typename T> void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++) {cerr<<v[i][0];for(ll j=1;j<w;j++)cerr spa v[i][j];cerr<<endl;}}; template<typename T> void debug(vector<T>&v,ll n){if(n!=0)cerr<<v[0]; for(ll i=1;i<n;i++)cerr spa v[i]; cerr<<endl;}; const ll INF = (1ll<<62); // const ld EPS = 1e-10; // const ld PI = acos(-1.0); const ll mod = (int)1e9 + 7; //const ll mod = 998244353; template <std::uint_fast64_t Modulus> class modint { // long long から modint を作るときは必ず正の数にしてからコンストラクタに入れること! // そうしないとバグります using u64 = std::uint_fast64_t; public: u64 a; constexpr modint(const u64 x = 0) noexcept : a(x % Modulus) {} constexpr u64 &value() noexcept { return a; } constexpr const u64 &value() const noexcept { return a; } constexpr modint operator+(const modint rhs) const noexcept { return modint(*this) += rhs; } constexpr modint operator-(const modint rhs) const noexcept { return modint(*this) -= rhs; } constexpr modint operator*(const modint rhs) const noexcept { return modint(*this) *= rhs; } constexpr modint operator/(const modint rhs) const noexcept { return modint(*this) /= rhs; } constexpr modint &operator+=(const modint rhs) noexcept { a += rhs.a; if (a >= Modulus) { a -= Modulus; } return *this; } constexpr modint &operator-=(const modint rhs) noexcept { if (a < rhs.a) { a += Modulus; } a -= rhs.a; return *this; } constexpr modint &operator*=(const modint rhs) noexcept { a = a * rhs.a % Modulus; return *this; } constexpr modint &operator/=(modint rhs) noexcept { u64 exp = Modulus - 2; while (exp) { if (exp % 2) { *this *= rhs; } rhs *= rhs; exp /= 2; } return *this; } }; using mint = modint<mod>; using vm = vector<mint>; using vvm = vector<vm>; ostream& operator << (ostream& os, const mint v){ os << v.value(); return os; } template <class T, class U> constexpr T power(T x, U exp) { T ret = static_cast<T>(1); while (exp) { if (exp % static_cast<U>(2) == static_cast<U>(1)) ret *= x; exp /= static_cast<U>(2); x *= x; } return ::std::move(ret); } // par[i] は,iがrootなら-(連結成分のサイズ)を,iがrootではないならばrootを返す // root(x) は必ずroot を返す struct UnionFindSize { vector<int> par; UnionFindSize(int n) : par(n, -1) { } void init(int n) { par.assign(n, -1); } int root(int x) { if (par[x] < 0) return x; else return par[x] = root(par[x]); } bool issame(int x, int y) { return root(x) == root(y); } bool merge(int x, int y) { x = root(x); y = root(y); if (x == y) return false; if (par[x] > par[y]) swap(x, y); // merge technique par[x] += par[y]; par[y] = x; return true; } int size(int x) { return -par[root(x)]; } void print(){ cout << "uf: "; for(int i=0;i<(int)par.size();i++) cout << root(i) << " "; cout << endl; } }; using Graph = V<V<pll>>; int main(){ ll N, M, X; cin >> N >> M >> X; V<ll> x(M), y(M), z(M); REP(i, M) cin >> x[i] >> y[i] >> z[i]; REP(i, M) x[i]--, y[i]--; V<ll> ids(M); iota(ALL(ids), 0); sort(ALL(ids), [&](ll x, ll y){ return z[x] < z[y]; }); UnionFindSize uf(N); Graph G(N); mint res = 0; for(auto idx: ids){ if(uf.merge(x[idx], y[idx])){ G[x[idx]].emplace_back(y[idx], z[idx]); G[y[idx]].emplace_back(x[idx], z[idx]); } } auto dfs = [&](auto self, ll now, ll par)->ll{ ll sz = 1; for(auto tup: G[now]){ ll next = tup.first; ll zz = tup.second; if(next == par) continue; ll tmp_sz = self(self, next, now); res += mint(tmp_sz) * (N-tmp_sz) * power(mint(X), zz); sz += tmp_sz; } return sz; }; dfs(dfs, 0, -1); cout << res << endl; return 0; }