結果
問題 | No.196 典型DP (1) |
ユーザー | tanimani364 |
提出日時 | 2022-04-21 10:26:49 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 53 ms / 2,000 ms |
コード長 | 4,447 bytes |
コンパイル時間 | 2,363 ms |
コンパイル使用メモリ | 209,556 KB |
実行使用メモリ | 19,584 KB |
最終ジャッジ日時 | 2024-06-22 09:12:08 |
合計ジャッジ時間 | 4,619 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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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
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,944 KB |
testcase_08 | AC | 2 ms
6,940 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
6,940 KB |
testcase_14 | AC | 2 ms
6,940 KB |
testcase_15 | AC | 3 ms
6,944 KB |
testcase_16 | AC | 5 ms
6,944 KB |
testcase_17 | AC | 8 ms
6,944 KB |
testcase_18 | AC | 14 ms
6,944 KB |
testcase_19 | AC | 16 ms
6,944 KB |
testcase_20 | AC | 23 ms
6,944 KB |
testcase_21 | AC | 22 ms
6,940 KB |
testcase_22 | AC | 22 ms
6,940 KB |
testcase_23 | AC | 35 ms
9,728 KB |
testcase_24 | AC | 31 ms
7,808 KB |
testcase_25 | AC | 30 ms
7,168 KB |
testcase_26 | AC | 53 ms
19,584 KB |
testcase_27 | AC | 53 ms
19,584 KB |
testcase_28 | AC | 52 ms
19,584 KB |
testcase_29 | AC | 52 ms
19,584 KB |
testcase_30 | AC | 52 ms
19,584 KB |
testcase_31 | AC | 43 ms
6,940 KB |
testcase_32 | AC | 44 ms
6,940 KB |
testcase_33 | AC | 44 ms
6,944 KB |
testcase_34 | AC | 43 ms
6,944 KB |
testcase_35 | AC | 44 ms
6,940 KB |
testcase_36 | AC | 41 ms
6,940 KB |
testcase_37 | AC | 23 ms
6,940 KB |
testcase_38 | AC | 41 ms
6,944 KB |
testcase_39 | AC | 38 ms
6,944 KB |
testcase_40 | AC | 42 ms
6,940 KB |
testcase_41 | AC | 2 ms
6,944 KB |
testcase_42 | AC | 3 ms
6,940 KB |
testcase_43 | AC | 2 ms
6,940 KB |
ソースコード
#include <bits/stdc++.h> //#include <boost/multiprecision/cpp_int.hpp> //#include <atcoder/all> using namespace std; #define rep(i, a) for (int i = (int)0; i < (int)a; ++i) #define repl(i, a) for (long long i = (long long)0; i < (long long)a; ++i) #define rrep(i, a) for (int i = (int)a; i > -1; --i) #define REP(i, a, b) for (int i = (int)a; i < (int)b; ++i) #define REPL(i, a, b) for (long long i = (long long)a; i < (long long)b; ++i) #define RREP(i, a, b) for (int i = (int)a; i > b; --i) #define pb push_back #define eb emplace_back #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define popcount __builtin_popcount #define popcountll __builtin_popcountll #define fi first #define se second using ll = long long; constexpr ll mod = 1e9 + 7; constexpr ll mod_998244353 = 998244353; constexpr ll INF = 1LL << 60; //#pragma GCC target("avx2") //#pragma GCC optimize("O3") //#pragma GCC optimize("unroll-loops") // using lll = boost::multiprecision::cpp_int; template <class T> inline bool chmin(T &a, T b) { if (a > b) { a = b; return true; } return false; } template <class T> inline bool chmax(T &a, T b) { if (a < b) { a = b; return true; } return false; } ll mypow(ll x, ll n, const ll &p = -1) { // x^nをmodで割った余り if (p != -1) { x = (x % p + p) % p; } ll ret = 1; while (n > 0) { if (n & 1) { if (p != -1) ret = (ret * x) % p; else ret *= x; } if (p != -1) x = (x * x) % p; else x *= x; n >>= 1; } return ret; } template <typename T> struct myrand { random_device seed; mt19937 mt; myrand() : mt(seed()) {} T operator()(T a, T b) { //[a,b) uniform_int_distribution<T> dist(a, b - 1); return dist(mt); } }; //using namespace atcoder; //------------------------ //----------------------- //------------------------ //------------------------ //------------------------ template<int mod> struct Modint{ int x; Modint():x(0){} Modint(int64_t y):x((y%mod+mod)%mod){} Modint &operator+=(const Modint &p){ if((x+=p.x)>=mod) x -= mod; return *this; } Modint &operator-=(const Modint &p){ if((x+=mod-p.x)>=mod) x -= mod; return *this; } Modint &operator*=(const Modint &p){ x = (1LL * x * p.x) % mod; return *this; } Modint &operator/=(const Modint &p){ *this *= p.inverse(); return *this; } Modint operator-() const { return Modint(-x); } Modint operator+(const Modint &p) const{ return Modint(*this) += p; } Modint operator-(const Modint &p) const{ return Modint(*this) -= p; } Modint operator*(const Modint &p) const{ return Modint(*this) *= p; } Modint operator/(const Modint &p) const{ return Modint(*this) /= p; } bool operator==(const Modint &p) const { return x == p.x; } bool operator!=(const Modint &p) const{return x != p.x;} Modint inverse() const{//非再帰拡張ユークリッド int a = x, b = mod, u = 1, v = 0; while(b>0){ int t = a / b; swap(a -= t * b, b); swap(u -= t * v, v); } return Modint(u); } Modint pow(int64_t n) const{//繰り返し二乗法 Modint ret(1), mul(x); while(n>0){ if(n&1) ret *= mul; mul *= mul; n >>= 1; } return ret; } friend ostream &operator<<(ostream &os,const Modint &p){ return os << p.x; } }; using modint = Modint<mod>; using modint2= Modint<mod_998244353>; vector<modint> dp[2000][3]; void solve() { int n,k; cin>>n>>k; vector<vector<int>>g(n); rep(i,n-1){ int a,b; cin>>a>>b; g[a].eb(b); g[b].eb(a); } auto rec=[&](auto self,int v,int p=-1)->void{//0:白,1:黒 rep(i,2)dp[v][i]=vector<modint>(2); dp[v][0][0]=1; dp[v][1][1]=1; for(int &x:g[v]){ if(x==p)continue; self(self,x,v); int sv=dp[v][0].size(); int sx=dp[x][0].size(); vector<modint>nxdp[2]; rep(i,2)nxdp[i].resize(sv+sx-1); rep(i,sv){ rep(j,sx){ if(i+j>=sv+sx-1)continue; nxdp[0][i+j]+=dp[v][0][i]*dp[x][0][j]; nxdp[0][i+j]+=dp[v][0][i]*dp[x][1][j]; nxdp[1][i+j]+=dp[v][1][i]*dp[x][1][j]; } } rep(i,2)swap(nxdp[i],dp[v][i]); } }; rec(rec,0); modint ans=dp[0][0][k]+dp[0][1][k]; cout<<ans<<"\n"; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cout << fixed << setprecision(15); solve(); return 0; }