結果
問題 | No.1207 グラフX |
ユーザー | toma |
提出日時 | 2020-08-30 15:24:33 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 408 ms / 2,000 ms |
コード長 | 4,045 bytes |
コンパイル時間 | 2,760 ms |
コンパイル使用メモリ | 216,636 KB |
実行使用メモリ | 41,536 KB |
最終ジャッジ日時 | 2024-11-15 08:55:29 |
合計ジャッジ時間 | 18,351 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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 | 325 ms
24,236 KB |
testcase_01 | AC | 336 ms
23,724 KB |
testcase_02 | AC | 326 ms
23,704 KB |
testcase_03 | AC | 329 ms
23,572 KB |
testcase_04 | AC | 339 ms
24,616 KB |
testcase_05 | AC | 406 ms
41,536 KB |
testcase_06 | AC | 407 ms
40,388 KB |
testcase_07 | AC | 408 ms
40,236 KB |
testcase_08 | AC | 273 ms
15,932 KB |
testcase_09 | AC | 284 ms
21,048 KB |
testcase_10 | AC | 391 ms
33,788 KB |
testcase_11 | AC | 400 ms
40,508 KB |
testcase_12 | AC | 267 ms
20,640 KB |
testcase_13 | AC | 171 ms
6,816 KB |
testcase_14 | AC | 315 ms
22,992 KB |
testcase_15 | AC | 283 ms
20,496 KB |
testcase_16 | AC | 162 ms
7,928 KB |
testcase_17 | AC | 225 ms
14,796 KB |
testcase_18 | AC | 175 ms
14,768 KB |
testcase_19 | AC | 234 ms
11,796 KB |
testcase_20 | AC | 333 ms
23,172 KB |
testcase_21 | AC | 31 ms
6,816 KB |
testcase_22 | AC | 217 ms
14,948 KB |
testcase_23 | AC | 237 ms
20,988 KB |
testcase_24 | AC | 158 ms
13,588 KB |
testcase_25 | AC | 323 ms
23,044 KB |
testcase_26 | AC | 254 ms
21,088 KB |
testcase_27 | AC | 313 ms
22,584 KB |
testcase_28 | AC | 292 ms
21,336 KB |
testcase_29 | AC | 290 ms
22,664 KB |
testcase_30 | AC | 150 ms
11,788 KB |
testcase_31 | AC | 148 ms
6,820 KB |
testcase_32 | AC | 120 ms
11,596 KB |
testcase_33 | AC | 130 ms
11,648 KB |
testcase_34 | AC | 268 ms
20,408 KB |
testcase_35 | AC | 32 ms
6,816 KB |
testcase_36 | AC | 268 ms
21,372 KB |
testcase_37 | AC | 237 ms
15,544 KB |
testcase_38 | AC | 62 ms
6,816 KB |
testcase_39 | AC | 137 ms
12,252 KB |
testcase_40 | AC | 123 ms
6,820 KB |
testcase_41 | AC | 210 ms
12,488 KB |
testcase_42 | AC | 2 ms
6,816 KB |
testcase_43 | AC | 2 ms
6,820 KB |
testcase_44 | AC | 2 ms
6,816 KB |
testcase_45 | AC | 301 ms
23,840 KB |
testcase_46 | AC | 297 ms
23,836 KB |
testcase_47 | AC | 302 ms
24,568 KB |
testcase_48 | AC | 298 ms
24,244 KB |
ソースコード
#include"bits/stdc++.h" using namespace std; #define REP(k,m,n) for(int (k)=(m);(k)<(n);(k)++) #define rep(i,n) REP((i),0,(n)) using ll = long long; using pii = pair<int, int>; using pll = pair<ll, ll>; using tp3 = tuple<ll, ll, ll>; using Mat = vector<vector<ll>>; constexpr int INF = 1 << 28; constexpr ll INFL = 1ll << 60; constexpr int dh[4] = { 0,1,0,-1 }; constexpr int dw[4] = { -1,0,1,0 }; bool isin(const int H, const int W, const int h, const int w) { return 0 <= h && h < H && 0 <= w && w < W; } class UnionFind { public: vector<int>rank, parent; //初期化 UnionFind(int size) { rank.resize(size, 0); parent.resize(size, 0); rep(i, size)parent[i] = i; } //木の根を求める int find(int x) { if (parent[x] == x)return x; else return parent[x] = find(parent[x]); } //xとyの属する集合を併合 void unite(int x, int y) { x = find(x); y = find(y); if (x == y)return; if (rank[x] < rank[y]) parent[x] = y; else { parent[y] = x; if (rank[x] == rank[y])rank[x]++; } } //xとyが同じ集合に属するか否か bool same(int x, int y) { return (find(x) == find(y)); } }; struct ModInt { static const ll MOD = 1000000007; // constructors etc ModInt() :num(1ll) {} ModInt(ll num_) :num(num_%MOD) {} ModInt(const ModInt& modint) :num(modint.num%MOD) {} ll get()const { return num; } // operator etc // operator ll() const { return num; } // ll operator*() { return num; } ModInt& operator+=(const ModInt& r) { (num += r.num) %= MOD; return *this; } ModInt& operator-=(const ModInt& r) { (num += -r.num + MOD) %= MOD; return *this; } ModInt& operator*=(const ModInt& r) { (num *= r.num) %= MOD; return *this; } ModInt& operator/=(const ModInt& r) { (num *= r.inv().num) %= MOD; return *this; } ModInt pow(const ModInt& r)const { ll res = 1; ll x = num; ll n = r.num; while (n > 0) { if (n & 1)res = (res*x) % MOD; x = (x*x) % MOD; n >>= 1; } return res; } ModInt inv()const { return this->pow(MOD - 2); } ModInt operator+(const ModInt& r)const { return ModInt(*this) += r; } ModInt operator-(const ModInt& r)const { return ModInt(*this) -= r; } ModInt operator*(const ModInt& r)const { return ModInt(*this) *= r; } ModInt operator/(const ModInt& r)const { return ModInt(*this) /= r; } ModInt operator+(const ll& r)const { return *this + ModInt(r); } ModInt operator-(const ll& r)const { return *this - ModInt(r); } ModInt operator*(const ll& r)const { return *this * ModInt(r); } ModInt operator/(const ll& r)const { return *this / ModInt(r); } private: ll num; }; ostream& operator<<(ostream& stream, const ModInt& val) { stream << val.get(); return stream; } // ============ template finished ============ int dfs(const vector<vector<pll>>& edges, vector<ll>& childs, const int now, const int par) { childs[now] = 1; for (auto[nextIdx, _] : edges[now])if (nextIdx != par) { childs[now] += dfs(edges, childs, nextIdx, now); } return childs[now]; } int main() { ll N, M, X; cin >> N >> M >> X; vector<vector<pll>> edges(N); vector<tp3> pairs; { UnionFind uf(N); rep(i, M) { ll x, y, z; cin >> x >> y >> z; x--; y--; if (uf.same(x, y))continue; uf.unite(x, y); edges[x].push_back({ y,z }); edges[y].push_back({ x,z }); pairs.push_back(make_tuple(x, y, z)); } } vector<ll> childs(N, 0); dfs(edges, childs, 0, -1); ModInt res(0); for (auto[x, y, z] : pairs) { ll small = min(childs[x], childs[y]); auto way = ModInt(small) * (N - small); auto value = ModInt(X).pow(z); res += value * way; } cout << res << endl; return 0; }