結果
問題 | No.994 ばらばらコイン |
ユーザー | r1933 |
提出日時 | 2020-02-21 21:44:02 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 45 ms / 2,000 ms |
コード長 | 5,710 bytes |
コンパイル時間 | 2,325 ms |
コンパイル使用メモリ | 207,696 KB |
実行使用メモリ | 12,928 KB |
最終ジャッジ日時 | 2024-10-08 21:29:49 |
合計ジャッジ時間 | 3,738 ms |
ジャッジサーバーID (参考情報) |
judge2 / 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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 34 ms
11,904 KB |
testcase_03 | AC | 42 ms
12,928 KB |
testcase_04 | AC | 45 ms
12,928 KB |
testcase_05 | AC | 22 ms
8,064 KB |
testcase_06 | AC | 42 ms
12,928 KB |
testcase_07 | AC | 43 ms
12,928 KB |
testcase_08 | AC | 25 ms
9,216 KB |
testcase_09 | AC | 39 ms
12,288 KB |
testcase_10 | AC | 28 ms
9,984 KB |
testcase_11 | AC | 31 ms
10,752 KB |
testcase_12 | AC | 35 ms
11,392 KB |
testcase_13 | AC | 2 ms
5,248 KB |
testcase_14 | AC | 2 ms
5,248 KB |
testcase_15 | AC | 2 ms
5,248 KB |
testcase_16 | AC | 1 ms
5,248 KB |
testcase_17 | AC | 2 ms
5,248 KB |
testcase_18 | AC | 2 ms
5,248 KB |
testcase_19 | AC | 2 ms
5,248 KB |
testcase_20 | AC | 2 ms
5,248 KB |
testcase_21 | AC | 1 ms
5,248 KB |
testcase_22 | AC | 2 ms
5,248 KB |
ソースコード
#include "bits/stdc++.h" // Begin Header {{{ using namespace std; #ifndef DEBUG #define dump(...) #endif #define all(x) x.begin(), x.end() #define rep(i, n) for (intmax_t i = 0, i##_limit = (n); i < i##_limit; ++i) #define reps(i, b, e) for (intmax_t i = (b), i##_limit = (e); i <= i##_limit; ++i) #define repr(i, b, e) for (intmax_t i = (b), i##_limit = (e); i >= i##_limit; --i) #define var(Type, ...) Type __VA_ARGS__; input(__VA_ARGS__) constexpr size_t operator""_zu(unsigned long long value) { return value; }; constexpr intmax_t operator""_jd(unsigned long long value) { return value; }; constexpr uintmax_t operator""_ju(unsigned long long value) { return value; }; constexpr int INF = 0x3f3f3f3f; constexpr intmax_t LINF = 0x3f3f3f3f3f3f3f3f_jd; template <class T> using MaxHeap = priority_queue<T, vector<T>, less<T>>; template <class T> using MinHeap = priority_queue<T, vector<T>, greater<T>>; inline void input() {} template <class Head, class... Tail> inline void input(Head&& head, Tail&&... tail) { cin >> head; input(forward<Tail>(tail)...); } template <class T> inline void input(vector<T> &vec) { for (auto &e: vec) { cin >> e; } } template <class T> inline void input(vector<vector<T>> &mat) { for (auto &vec: mat) { input(vec); } } inline void print() { cout << "\n"; } template <class Head, class... Tail> inline void print(Head&& head, Tail&&... tail) { cout << head; if (sizeof...(tail)) { cout << " "; } print(forward<Tail>(tail)...); } template <class T> inline ostream& operator<<(ostream &os, const vector<T> &vec) { static constexpr const char *delim[] = {" ", ""}; for (const auto &e: vec) { os << e << delim[&e == &vec.back()]; } return os; } template <class T> inline vector<T> makeVector(const T &initValue, size_t sz) { return vector<T>(sz, initValue); } template <class T, class... Args> inline auto makeVector(const T &initValue, size_t sz, Args... args) { return vector<decltype(makeVector<T>(initValue, args...))>(sz, makeVector<T>(initValue, args...)); } template <class Func> class FixPoint : Func { public: explicit constexpr FixPoint(Func&& f) noexcept : Func(forward<Func>(f)) {} template <class... Args> constexpr decltype(auto) operator()(Args&&... args) const { return Func::operator()(*this, std::forward<Args>(args)...); } }; template <class Func> static inline constexpr decltype(auto) makeFixPoint(Func&& f) noexcept { return FixPoint<Func>{forward<Func>(f)}; } template <class T> inline bool chmax(T &a, const T &b) noexcept { return b > a && (a = b, true); } template <class T> inline bool chmin(T &a, const T &b) noexcept { return b < a && (a = b, true); } template <class T> inline T diff(const T &a, const T &b) noexcept { return a < b ? b - a : a - b; } // End Header }}} // Edge {{{ template <class Weight> struct Edge { size_t from, to; Weight weight; Edge() {} Edge(size_t from, size_t to, Weight weight = 1) : from(from), to(to), weight(weight) {} bool operator<(const Edge &rhs) const { return weight < rhs.weight; } bool operator>(const Edge &rhs) const { return weight > rhs.weight; } operator size_t() const { return to; } }; // }}} // Graph {{{ template <class Weight> class Graph : public vector<vector<Edge<Weight>>> { using graph = vector<vector<Edge<Weight>>>; public: Graph() {} Graph(const size_t V) : graph(V) {} void connect(size_t from, size_t to, Weight weight = 1) { (*this)[from].emplace_back(from, to, weight); } friend ostream& operator<<(ostream &strm, const Graph &G) { for (size_t v = 0; v < G.size(); ++v) { strm << '[' << setw(2) << v << ']'; for (const auto &e: G[v]) { strm << ' ' << setw(2) << e.to; } strm << '\n'; } return strm; } }; // }}} // UnionFind {{{ struct UnionFind { vector<int> tree; explicit UnionFind(const size_t n) : tree(n + 1, -1) {} size_t size(size_t i) { return -tree[root(i)]; } size_t root(size_t x) { return (tree[x] < 0) ? x : tree[x] = root(tree[x]); } bool connected(size_t x, size_t y) { return root(x) == root(y); } bool unite(size_t x, size_t y) { x = root(x); y = root(y); if (x == y) { return false; } else { tree[x] += tree[y]; tree[y] = x; return true; } } }; // }}} // kruskal {{{ template <class Weight> Weight kruskal(vector<Edge<Weight>> &es) { const size_t V = es.size(); UnionFind uf(V); Weight minCost = 0; sort(es.begin(), es.end()); for (const auto &e: es) { if (uf.unite(e.from, e.to)) { minCost += e.weight; } } return minCost; } // }}} int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); var(size_t, N, K); Graph<size_t> G(N); rep(i, N - 1) { var(size_t, a, b); a--, b--; G.connect(a, b); G.connect(b, a); } if (K > N) { return print(-1), 0; } vector<size_t> seen(N); const auto dfs = makeFixPoint([&](auto dfs, size_t cur) -> void { seen[cur] = true; for (const auto e: G[cur]) { if (!seen[e.to]) { dfs(e.to); } } }); dfs(0); size_t connectedCnt = 0; rep(v, N) { connectedCnt += seen[v]; } if (connectedCnt >= K) { print(K - 1); } else { print(-1); } return 0; }