結果
問題 | No.196 典型DP (1) |
ユーザー | is_eri23 |
提出日時 | 2015-04-29 07:46:59 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 585 ms / 2,000 ms |
コード長 | 3,461 bytes |
コンパイル時間 | 1,588 ms |
コンパイル使用メモリ | 163,832 KB |
実行使用メモリ | 66,900 KB |
最終ジャッジ日時 | 2024-07-05 16:40:56 |
合計ジャッジ時間 | 5,187 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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 | 37 ms
66,560 KB |
testcase_01 | AC | 37 ms
66,572 KB |
testcase_02 | AC | 37 ms
66,576 KB |
testcase_03 | AC | 34 ms
66,572 KB |
testcase_04 | AC | 34 ms
66,572 KB |
testcase_05 | AC | 36 ms
66,572 KB |
testcase_06 | AC | 35 ms
66,572 KB |
testcase_07 | AC | 35 ms
66,576 KB |
testcase_08 | AC | 35 ms
66,504 KB |
testcase_09 | AC | 34 ms
66,572 KB |
testcase_10 | AC | 34 ms
66,448 KB |
testcase_11 | AC | 35 ms
66,576 KB |
testcase_12 | AC | 35 ms
66,580 KB |
testcase_13 | AC | 36 ms
66,580 KB |
testcase_14 | AC | 35 ms
66,580 KB |
testcase_15 | AC | 37 ms
66,336 KB |
testcase_16 | AC | 42 ms
66,560 KB |
testcase_17 | AC | 49 ms
66,432 KB |
testcase_18 | AC | 78 ms
66,560 KB |
testcase_19 | AC | 64 ms
66,560 KB |
testcase_20 | AC | 39 ms
66,560 KB |
testcase_21 | AC | 42 ms
66,560 KB |
testcase_22 | AC | 37 ms
66,560 KB |
testcase_23 | AC | 276 ms
66,688 KB |
testcase_24 | AC | 58 ms
66,688 KB |
testcase_25 | AC | 585 ms
66,688 KB |
testcase_26 | AC | 35 ms
66,688 KB |
testcase_27 | AC | 35 ms
66,900 KB |
testcase_28 | AC | 35 ms
66,768 KB |
testcase_29 | AC | 35 ms
66,640 KB |
testcase_30 | AC | 35 ms
66,688 KB |
testcase_31 | AC | 35 ms
66,560 KB |
testcase_32 | AC | 77 ms
66,652 KB |
testcase_33 | AC | 96 ms
66,780 KB |
testcase_34 | AC | 117 ms
66,772 KB |
testcase_35 | AC | 35 ms
66,560 KB |
testcase_36 | AC | 34 ms
66,560 KB |
testcase_37 | AC | 49 ms
66,644 KB |
testcase_38 | AC | 93 ms
66,776 KB |
testcase_39 | AC | 90 ms
66,780 KB |
testcase_40 | AC | 35 ms
66,560 KB |
testcase_41 | AC | 33 ms
66,560 KB |
testcase_42 | AC | 34 ms
66,444 KB |
testcase_43 | AC | 35 ms
66,432 KB |
ソースコード
#include <bits/stdc++.h> #define EPS 1e-9 #define INF 1070000000LL #define MOD 1000000007LL #define fir first #define foreach(it,X) for(auto it=(X).begin();it!=(X).end();it++) #define numa(x,a) for(auto x: a) #define ite iterator #define mp make_pair #define rep(i,n) rep2(i,0,n) #define rep2(i,m,n) for(int i=m;i<(n);i++) #define pb push_back #define pf push_front #define sec second #define sz(x) ((int)(x).size()) #define ALL( c ) (c).begin(), (c).end() #define gcd(a,b) __gcd(a,b) #define mem(x,n) memset(x,n,sizeof(x)) #define endl "\n" using namespace std; template <int POS, class TUPLE> void deploy(std::ostream &os, const TUPLE &tuple){} template <int POS, class TUPLE, class H, class ...Ts> void deploy(std::ostream &os, const TUPLE &t){ os << (POS == 0 ? "" : ", ") << get<POS>(t); deploy<POS + 1, TUPLE, Ts...>(os, t); } template <class T,class U> std::ostream& operator<<(std::ostream &os, std::pair<T,U> &p){ os << "(" << p.first <<", " << p.second <<")";return os; } template <class T> std::ostream& operator<<(std::ostream &os, std::vector<T> &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; } template <class T> std::ostream& operator<<(std::ostream &os, std::set<T> &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; } template <class T, class K> std::ostream& operator<<(std::ostream &os, std::map<T, K> &mp){ int remain = mp.size(); os << "{"; for(auto e: mp) os << "(" << e.first << " -> " << e.second << ")" << (--remain == 0 ? "}" : ", "); return os; } #define DEBUG1(var0) { std::cerr << (#var0) << "=" << (var0) << endl; } #define DEBUG2(var0, var1) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG1(var1); } #define DEBUG3(var0, var1, var2) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG2(var1,var2); } #define DEBUG4(var0, var1, var2, var3) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG3(var1,var2,var3); } using ll = long long; ll memo[2010][2010]; ll memo2[2010][2010]; vector <int> edge[2010]; int N,K; int childs[2010]; int dfs(int now, int par = -1){ childs[now] = 1; numa(x,edge[now]){ if (x != par) { childs[now] += dfs(x,now); } } return childs[now]; } ll calc(int par, int now, vector <pair <int,int> > &Ks, int K); ll dp_go(int now, int K, int par = -1){ //black if (childs[now] < K) { return 0; } if (childs[now] == K) { return 1; } if (K == 0) { return 1; } if (memo[now][K] >= 0) { return memo[now][K]; } vector <pair <int,int > > Ks; numa(x,edge[now]){ if (x != par) { Ks.pb(mp(x, childs[x])); } } ll ret = calc(now, 0, Ks, K); return memo[now][K] = ret; } ll calc(int par, int now, vector <pair <int,int> > &Ks, int K){ auto x = Ks[now].fir; auto child_max = Ks[now].sec; if (now == sz(Ks) - 1) { return dp_go(x, K, par); } if (memo2[x][K] >= 0) { return memo2[x][K]; } ll ret = 0; for (int k = 0; k <= min(K, child_max); k++) { auto add = dp_go(x, k, par); if (add) { add *= calc(par, now + 1, Ks, K - k); add %= MOD; ret += add; ret %= MOD; } } return memo2[x][K] = ret; } int main() { cin.tie(0); ios_base::sync_with_stdio(0); cin >> N >> K; rep(i,N-1){ int x,y; cin >> x >> y; edge[x].pb(y); edge[y].pb(x); } mem(memo,-1); mem(memo2,-1); dfs(0); cout << dp_go(0, K) << endl; return 0; }