結果
問題 | No.827 総神童数 |
ユーザー | null_null |
提出日時 | 2019-05-13 15:18:15 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 91 ms / 2,000 ms |
コード長 | 3,028 bytes |
コンパイル時間 | 1,632 ms |
コンパイル使用メモリ | 172,860 KB |
実行使用メモリ | 25,344 KB |
最終ジャッジ日時 | 2024-07-07 17:20:49 |
合計ジャッジ時間 | 6,066 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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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 | 10 ms
12,672 KB |
testcase_01 | AC | 10 ms
12,800 KB |
testcase_02 | AC | 10 ms
12,800 KB |
testcase_03 | AC | 9 ms
12,928 KB |
testcase_04 | AC | 10 ms
12,928 KB |
testcase_05 | AC | 10 ms
12,800 KB |
testcase_06 | AC | 11 ms
12,672 KB |
testcase_07 | AC | 10 ms
13,056 KB |
testcase_08 | AC | 10 ms
12,928 KB |
testcase_09 | AC | 85 ms
25,344 KB |
testcase_10 | AC | 32 ms
17,024 KB |
testcase_11 | AC | 11 ms
13,184 KB |
testcase_12 | AC | 20 ms
14,848 KB |
testcase_13 | AC | 62 ms
23,168 KB |
testcase_14 | AC | 12 ms
13,312 KB |
testcase_15 | AC | 29 ms
17,024 KB |
testcase_16 | AC | 64 ms
21,248 KB |
testcase_17 | AC | 78 ms
23,168 KB |
testcase_18 | AC | 37 ms
18,048 KB |
testcase_19 | AC | 91 ms
21,280 KB |
testcase_20 | AC | 65 ms
19,328 KB |
testcase_21 | AC | 48 ms
17,408 KB |
testcase_22 | AC | 71 ms
19,840 KB |
testcase_23 | AC | 10 ms
13,056 KB |
testcase_24 | AC | 84 ms
20,608 KB |
testcase_25 | AC | 59 ms
18,816 KB |
testcase_26 | AC | 81 ms
20,608 KB |
testcase_27 | AC | 54 ms
17,920 KB |
testcase_28 | AC | 53 ms
17,920 KB |
testcase_29 | AC | 42 ms
17,024 KB |
testcase_30 | AC | 20 ms
14,336 KB |
testcase_31 | AC | 35 ms
16,000 KB |
testcase_32 | AC | 36 ms
15,872 KB |
testcase_33 | AC | 90 ms
21,200 KB |
testcase_34 | AC | 78 ms
20,608 KB |
testcase_35 | AC | 36 ms
15,872 KB |
testcase_36 | AC | 51 ms
17,664 KB |
testcase_37 | AC | 63 ms
18,688 KB |
testcase_38 | AC | 87 ms
21,120 KB |
ソースコード
#define _USE_MATH_DEFINES #define _CRT_SECURE_NO_WARNINGS #include <bits/stdc++.h> using namespace std; /*BigInteger #include <boost/multiprecision/cpp_dec_float.hpp> #include <boost/multiprecision/cpp_int.hpp> #include <boost/rational.hpp> namespace xxx = boost::multiprecision; using Bint = xxx::cpp_int; using Real = xxx::number<xxx::cpp_dec_float<1024>>; */ #define int long long #define pb(x) push_back(x) #define m0(x) memset((x), 0LL, sizeof(x)) #define mm(x) memset((x), -1LL, sizeof(x)) //container #define ALL(x) (x).begin(), (x).end() #define RALL(a) (a).rbegin(), (a).rend() #define EACH(i, c) for (typeof((c).begin()) i = (c).begin(); i != (c).end(); ++i) #define EXIST(s, e) ((s).find(e) != (s).end()) #define UNIQUE(v) (v).erase(unique((v).begin(), (v).end()), (v).end()); #define PERM(c) \ sort(ALL(c)); \ for (bool c##p = 1; c##p; c##p = next_permutation(ALL(c))) // debug #define GET_VAR_NAME(variable) #variable #define test(x) cout << GET_VAR_NAME(x) << " = " << x << endl; // bit_macro #define Bit(n) (1LL << (n)) #define Bitset(a, b) (a) |= (1LL << (b)) #define Bitunset(a, b) (a) &= ~(1LL << (b)) #define Bitcheck(a, b) ((((a) >> (b)) & 1LL) == 1LL) #define Bitcount(a) __builtin_popcountll((a)) //typedef typedef long long lint; typedef unsigned long long ull; typedef complex<long double> Complex; typedef pair<int, int> P; typedef tuple<int, int, int> TP; typedef vector<int> vec; typedef vector<vec> mat; //constant constexpr int INF = (int)1e18; constexpr int MOD = (int)1e9 + 7; constexpr double PI = (double)acos(-1); constexpr double EPS = (double)1e-10; constexpr int dx[] = {-1, 0, 0, 1, 0, -1, -1, 1, 1}; constexpr int dy[] = {0, -1, 1, 0, 0, 1, -1, 1, -1}; // template <typename T> void chmax(T &a, T b) { a = max(a, b); } template <typename T> void chmin(T &a, T b) { a = min(a, b); } // inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v; } template <class T> inline string toString(T x) { ostringstream sout; sout << x; return sout.str(); } // struct Accelerate_Cin { Accelerate_Cin() { cin.tie(0); ios::sync_with_stdio(0); cout << fixed << setprecision(20); }; } Accelerate_Cin; int N; vector<int> G[202020]; int dep[202020]; const int MAX = 202020; int fac[MAX], finv[MAX], inv[MAX]; void fact_Init() { fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for (int i = 2; i < MAX; i++) { fac[i] = fac[i - 1] * i % MOD; inv[i] = MOD - inv[MOD % i] * (MOD / i) % MOD; finv[i] = finv[i - 1] * inv[i] % MOD; } } void dfs(int n, int pre) { for (auto x : G[n]) { if (x != pre) { dep[x] = dep[n] + 1; dfs(x, n); } } } signed main() { cin >> N; for (int i = 0; i < N - 1; i++) { int u, v; cin >> u >> v; u--, v--; G[u].push_back(v); G[v].push_back(u); } dep[0] = 0; dfs(0, -1); fact_Init(); int ans = 0; for (int i = 0; i < N; i++) { ans += fac[N] * inv[dep[i] + 1] % MOD; ans %= MOD; } cout << ans << endl; return 0; }