結果
問題 | No.196 典型DP (1) |
ユーザー | paruki |
提出日時 | 2016-08-24 14:45:02 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 2,820 bytes |
コンパイル時間 | 1,754 ms |
コンパイル使用メモリ | 171,216 KB |
実行使用メモリ | 26,040 KB |
最終ジャッジ日時 | 2024-11-08 02:03:06 |
合計ジャッジ時間 | 9,555 ms |
ジャッジサーバーID (参考情報) |
judge5 / 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 | 7 ms
24,704 KB |
testcase_01 | AC | 8 ms
19,200 KB |
testcase_02 | AC | 7 ms
19,072 KB |
testcase_03 | AC | 8 ms
19,456 KB |
testcase_04 | AC | 7 ms
19,200 KB |
testcase_05 | AC | 8 ms
19,328 KB |
testcase_06 | AC | 7 ms
19,184 KB |
testcase_07 | AC | 7 ms
19,172 KB |
testcase_08 | AC | 8 ms
19,200 KB |
testcase_09 | AC | 7 ms
19,328 KB |
testcase_10 | AC | 7 ms
19,200 KB |
testcase_11 | AC | 7 ms
19,196 KB |
testcase_12 | AC | 7 ms
19,312 KB |
testcase_13 | AC | 6 ms
19,304 KB |
testcase_14 | AC | 7 ms
19,328 KB |
testcase_15 | AC | 11 ms
19,328 KB |
testcase_16 | AC | 14 ms
19,328 KB |
testcase_17 | AC | 28 ms
19,332 KB |
testcase_18 | AC | 75 ms
19,328 KB |
testcase_19 | AC | 83 ms
19,328 KB |
testcase_20 | AC | 79 ms
19,272 KB |
testcase_21 | AC | 106 ms
19,200 KB |
testcase_22 | AC | 118 ms
19,204 KB |
testcase_23 | AC | 1,304 ms
19,328 KB |
testcase_24 | AC | 817 ms
19,228 KB |
testcase_25 | AC | 785 ms
19,452 KB |
testcase_26 | TLE | - |
testcase_27 | -- | - |
testcase_28 | -- | - |
testcase_29 | -- | - |
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" using namespace std; #define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i)) #define rep(i,j) FOR(i,0,j) #define each(x,y) for(auto &(x):(y)) #define mp make_pair #define all(x) (x).begin(),(x).end() #define debug(x) cout<<#x<<": "<<(x)<<endl #define smax(x,y) (x)=max((x),(y)) #define smin(x,y) (x)=min((x),(y)) #define MEM(x,y) memset((x),(y),sizeof (x)) #define sz(x) (int)(x).size() typedef long long ll; typedef pair<int, int> pii; typedef vector<int> vi; typedef vector<ll> vll; template<int MOD> class ModInt{ public: ModInt():value(0){} ModInt(long long val):value((int)(val<0?MOD+val%MOD:val%MOD)){ } ModInt& operator+=(ModInt that){ value = value+that.value; if(value>=MOD)value-=MOD; return *this; } ModInt& operator-=(ModInt that){ value -= that.value; if(value<0)value+=MOD; return *this; } ModInt& operator*=(ModInt that){ value = (int)((long long)value * that.value % MOD); return *this; } ModInt &operator/=(ModInt that){ return *this *= that.inverse(); } ModInt operator+(ModInt that) const{ return ModInt(*this)+=that; } ModInt operator-(ModInt that) const{ return ModInt(*this)-=that; } ModInt operator*(ModInt that) const{ return ModInt(*this)*=that; } ModInt operator/(ModInt that) const { return ModInt(*this) /= that; } ModInt pow(long long k) const{ if(value == 0)return 0; ModInt n = *this, res = 1; while(k){ if(k & 1)res *= n; n *= n; k >>= 1; } return res; } ModInt inverse() const { long long a = value, b = MOD, u = 1, v = 0; while(b) { long long t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } return ModInt(u); } int toi() const{ return value; } private: int value; }; typedef ModInt<1000000007> mint; ostream& operator<<(ostream& os, const mint& x){ os << x.toi(); return os; } int N, K, s[2000]; vi G[2000]; mint dp[2000][2001]; void g(int u, int p){ s[u] = 1; each(v, G[u])if(v != p){ g(v, u); s[u] += s[v]; } } void f(int u, int p){ dp[u][0] = dp[u][s[u]] = 1; each(v, G[u])if(v != p){ f(v, u); for(int i = s[u]-1; i >= 0; --i){ FOR(j, 1, s[v] + 1){ if(i + j <= s[u]){ dp[u][i+j]+=dp[u][i]*dp[v][j]; } } } } } int main(){ int u, v; cin >> N >> K; rep(i, N-1){ scanf("%d%d", &u, &v); G[u].push_back(v); G[v].push_back(u); } g(0, -1); f(0, -1); cout << dp[0][K] << endl; }