結果
問題 | No.196 典型DP (1) |
ユーザー | is_eri23 |
提出日時 | 2015-10-22 12:11:50 |
言語 | C++11 (gcc 11.4.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,111 bytes |
コンパイル時間 | 1,309 ms |
コンパイル使用メモリ | 166,056 KB |
実行使用メモリ | 63,260 KB |
最終ジャッジ日時 | 2024-07-22 11:29:07 |
合計ジャッジ時間 | 9,587 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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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 | 1 ms
10,752 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 1 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 1 ms
5,376 KB |
testcase_09 | AC | 1 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 1 ms
5,376 KB |
testcase_12 | AC | 1 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 1 ms
5,376 KB |
testcase_15 | AC | 4 ms
5,376 KB |
testcase_16 | AC | 10 ms
5,376 KB |
testcase_17 | AC | 17 ms
5,376 KB |
testcase_18 | AC | 44 ms
5,376 KB |
testcase_19 | AC | 34 ms
5,376 KB |
testcase_20 | AC | 4 ms
5,376 KB |
testcase_21 | AC | 8 ms
5,376 KB |
testcase_22 | AC | 3 ms
5,376 KB |
testcase_23 | AC | 279 ms
8,804 KB |
testcase_24 | AC | 17 ms
5,376 KB |
testcase_25 | AC | 906 ms
12,164 KB |
testcase_26 | AC | 3 ms
5,376 KB |
testcase_27 | AC | 182 ms
11,264 KB |
testcase_28 | TLE | - |
testcase_29 | TLE | - |
testcase_30 | -- | - |
testcase_31 | -- | - |
testcase_32 | -- | - |
testcase_33 | -- | - |
testcase_34 | -- | - |
testcase_35 | -- | - |
testcase_36 | -- | - |
testcase_37 | -- | - |
testcase_38 | -- | - |
testcase_39 | -- | - |
testcase_40 | -- | - |
testcase_41 | -- | - |
testcase_42 | -- | - |
testcase_43 | -- | - |
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; vector <int> edge[2010]; int cnt[2010]; int N,K; vector <ll> go(int now, int par = -1) { if (sz(edge[now]) == 1 && par != -1) { vector <ll> ret(K+1,0); cnt[now] = 1; ret[0] = 1; ret[1] = 1; return ret; } vector <ll> ret[2]; ret[0].resize(K+1,0); ret[1].resize(K+1,0); ret[1][0] = 1; int cur = 0, bef = 1; int all = 1; numa(x,edge[now]) { if (x == par) { continue; } auto child = go(x,now); all += cnt[x]; for (int i = 0; i <= K; i++) { ret[cur][i] = 0; } for (int i = 0; i <= K; i++) { if (child[i]) { for (int j = 0; j + i <= K; j++) { ret[cur][i+j] += (child[i] * ret[bef][j] % MOD); ret[cur][i+j] %= MOD; } } } swap(cur, bef); } if (K >= all) { ret[bef][all] = 1; } cnt[now] = all; //DEBUG2(now, ret[bef]); return ret[bef]; } 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); } auto ans = go(0); //DEBUG1(ans); cout << ans[K] << endl; return 0; }