結果
問題 | No.196 典型DP (1) |
ユーザー | satanic |
提出日時 | 2018-08-26 14:51:37 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 31 ms / 2,000 ms |
コード長 | 5,961 bytes |
コンパイル時間 | 1,258 ms |
コンパイル使用メモリ | 125,952 KB |
実行使用メモリ | 26,624 KB |
最終ジャッジ日時 | 2024-07-01 03:56:14 |
合計ジャッジ時間 | 3,066 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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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
6,812 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 2 ms
6,944 KB |
testcase_12 | AC | 2 ms
6,940 KB |
testcase_13 | AC | 2 ms
6,944 KB |
testcase_14 | AC | 3 ms
6,940 KB |
testcase_15 | AC | 4 ms
9,860 KB |
testcase_16 | AC | 5 ms
13,988 KB |
testcase_17 | AC | 8 ms
20,032 KB |
testcase_18 | AC | 12 ms
26,220 KB |
testcase_19 | AC | 13 ms
10,368 KB |
testcase_20 | AC | 17 ms
11,904 KB |
testcase_21 | AC | 17 ms
11,904 KB |
testcase_22 | AC | 17 ms
12,032 KB |
testcase_23 | AC | 24 ms
17,280 KB |
testcase_24 | AC | 22 ms
15,616 KB |
testcase_25 | AC | 21 ms
14,976 KB |
testcase_26 | AC | 31 ms
26,496 KB |
testcase_27 | AC | 29 ms
26,496 KB |
testcase_28 | AC | 29 ms
26,624 KB |
testcase_29 | AC | 31 ms
26,368 KB |
testcase_30 | AC | 30 ms
26,496 KB |
testcase_31 | AC | 26 ms
11,520 KB |
testcase_32 | AC | 26 ms
11,648 KB |
testcase_33 | AC | 26 ms
11,520 KB |
testcase_34 | AC | 26 ms
11,520 KB |
testcase_35 | AC | 26 ms
11,520 KB |
testcase_36 | AC | 26 ms
11,648 KB |
testcase_37 | AC | 17 ms
11,648 KB |
testcase_38 | AC | 25 ms
11,520 KB |
testcase_39 | AC | 23 ms
11,520 KB |
testcase_40 | AC | 26 ms
11,520 KB |
testcase_41 | AC | 2 ms
5,376 KB |
testcase_42 | AC | 2 ms
5,376 KB |
testcase_43 | AC | 2 ms
5,376 KB |
ソースコード
// need #include <iostream> #include <algorithm> // data structure #include <bitset> #include <map> #include <queue> #include <set> #include <stack> #include <string> #include <utility> #include <vector> #include <complex> //#include <deque> #include <valarray> #include <unordered_map> #include <array> // stream //#include <istream> //#include <sstream> //#include <ostream> #include <fstream> // etc #include <cassert> #include <cmath> #include <functional> #include <iomanip> //#include <chrono> #include <random> #include <numeric> // input #define INIT std::ios::sync_with_stdio(false);std::cin.tie(0); #define VAR(type, ...)type __VA_ARGS__;MACRO_VAR_Scan(__VA_ARGS__); template<typename T> void MACRO_VAR_Scan(T& t) { std::cin >> t; } template<typename First, typename...Rest>void MACRO_VAR_Scan(First& first, Rest&...rest) { std::cin >> first; MACRO_VAR_Scan(rest...); } #define VEC_ROW(type, n, ...)std::vector<type> __VA_ARGS__;MACRO_VEC_ROW_Init(n, __VA_ARGS__); for(int w=0; w<n; ++w){MACRO_VEC_ROW_Scan(w, __VA_ARGS__);} template<typename T> void MACRO_VEC_ROW_Init(int n, T& t) { t.resize(n); } template<typename First, typename...Rest>void MACRO_VEC_ROW_Init(int n, First& first, Rest&...rest) { first.resize(n); MACRO_VEC_ROW_Init(n, rest...); } template<typename T> void MACRO_VEC_ROW_Scan(int p, T& t) { std::cin >> t[p]; } template<typename First, typename...Rest>void MACRO_VEC_ROW_Scan(int p, First& first, Rest&...rest) { std::cin >> first[p]; MACRO_VEC_ROW_Scan(p, rest...); } #define VEC(type, c, n) std::vector<type> c(n);for(auto& i:c)std::cin>>i; #define MAT(type, c, m, n) std::vector<std::vector<type>> c(m, std::vector<type>(n));for(auto& r:c)for(auto& w:r)std::cin>>w; // output #define OUT(dist) std::cout<<(dist); #define FOUT(n, dist) std::cout<<std::fixed<<std::setprecision(n)<<(dist); #define SOUT(n, c, dist) std::cout<<std::setw(n)<<std::setfill(c)<<(dist); #define SP std::cout<<" "; #define TAB std::cout<<"\t"; #define BR std::cout<<"\n"; #define SPBR(w, n) std::cout<<(w + 1 == n ? '\n' : ' '); #define ENDL std::cout<<std::endl; #define FLUSH std::cout<<std::flush; #define SHOW(dist) {std::cerr << #dist << "\t:" << (dist) << "\n";} #define SHOWVECTOR(v) {std::cerr << #v << "\t:";for(const auto& xxx : v){std::cerr << xxx << " ";}std::cerr << "\n";} #define SHOWVECTOR2(v) {std::cerr << #v << "\t:\n";for(const auto& xxx : v){for(const auto& yyy : xxx){std::cerr << yyy << " ";}std::cerr << "\n";}} #define SHOWQUEUE(a) {auto tmp(a);std::cerr << #a << "\t:";while(!tmp.empty()){std::cerr << tmp.front() << " ";tmp.pop();}std::cerr << "\n";} // utility #define ALL(a) (a).begin(),(a).end() #define FOR(w, a, n) for(int w=(a);w<(n);++w) #define RFOR(w, a, n) for(int w=(n)-1;w>=(a);--w) #define REP(w, n) for(int w=0;w<int(n);++w) #define RREP(w, n) for(int w=int(n)-1;w>=0;--w) #define FORLL(w, a, n) for(ll w=ll(a);w<ll(n);++w) #define RFORLL(w, a, n) for(ll w=ll(n)-1;w>=ll(a);--w) #define REPLL(w, n) for(ll w=0;w<ll(n);++w) #define RREPLL(w, n) for(ll w=ll(n)-1;w>=0;--w) #define IN(a, x, b) (a<=x && x<b) template<class T> inline T CHMAX(T& a, const T b) { return a = (a < b) ? b : a; } template<class T> inline T CHMIN(T& a, const T b) { return a = (a > b) ? b : a; } #define EXCEPTION(msg) throw std::string("Exception : " msg " [ in ") + __func__ + " : " + std::to_string(__LINE__) + " lines ]" #define TRY(cond, msg) try {if (cond) EXCEPTION(msg);}catch (std::string s) {std::cerr << s << std::endl;} //void CHECKTIME(std::function<void()> f) { auto start = std::chrono::system_clock::now(); f(); auto end = std::chrono::system_clock::now(); auto res = std::chrono::duration_cast<std::chrono::nanoseconds>((end - start)).count(); std::cerr << "[Time:" << res << "ns (" << res / (1.0e9) << "s)]\n"; } // test template<class T> std::vector<std::vector<T>> VV(int n, int m, T init = T()) { return std::vector<std::vector<T>>(n, std::vector<T>(m, init)); } template<typename S, typename T> std::ostream& operator<<(std::ostream& os, std::pair<S, T> p) { os << "(" << p.first << ", " << p.second << ")"; return os; } // type/const #define int ll using ll = long long; using ull = unsigned long long; using ld = long double; using PAIR = std::pair<int, int>; using PAIRLL = std::pair<ll, ll>; constexpr int INFINT = 1 << 30; // 1.07x10^ 9 constexpr int INFINT_LIM = (1LL << 31) - 1; // 2.15x10^ 9 constexpr ll INFLL = 1LL << 60; // 1.15x10^18 constexpr ll INFLL_LIM = (1LL << 62) - 1 + (1LL << 62); // 9.22x10^18 constexpr double EPS = 1e-10; constexpr int MOD = 1000000007; constexpr double PI = 3.141592653589793238462643383279; template<class T, size_t N> void FILL(T(&a)[N], const T& val) { for (auto& x : a) x = val; } template<class ARY, size_t N, size_t M, class T> void FILL(ARY(&a)[N][M], const T& val) { for (auto& b : a) FILL(b, val); } template<class T> void FILL(std::vector<T>& a, const T& val) { for (auto& x : a) x = val; } template<class ARY, class T> void FILL(std::vector<std::vector<ARY>>& a, const T& val) { for (auto& b : a) FILL(b, val); } // ------------>8------------------------------------->8------------ int dp[2003][2003]; // dp[v][x] := v部分木でx個黒く塗る場合の数 signed main() { INIT; VAR(int, n, k); VEC_ROW(int, n - 1, a, b); std::vector<std::vector<int>> g(n); REP(i, n - 1) { g[a[i]].emplace_back(b[i]); g[b[i]].emplace_back(a[i]); } std::vector<int> sz(n, 1); std::function<void(int, int)> dfs = [&](int v, int par) { for (auto& to : g[v]) if (to != par) { dfs(to, v); sz[v] += sz[to]; } int tsz = 1; dp[v][0] = 1; std::vector<int> dp2(sz[v] + 1, 0); for (auto& to : g[v]) if (to != par) { REP(i1, tsz + 1) REP(i2, sz[to] + 1) { (dp2[i1 + i2] += dp[v][i1] * dp[to][i2] % MOD) %= MOD; } tsz += sz[to]; REP(i, tsz + 1) { dp[v][i] = dp2[i]; dp2[i] = 0; } } dp[v][sz[v]] = 1; }; dfs(0, -1); OUT(dp[0][k])BR; return 0; }