結果
問題 |
No.741 AscNumber(Easy)
|
ユーザー |
|
提出日時 | 2020-02-11 23:17:38 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 480 ms / 2,000 ms |
コード長 | 3,028 bytes |
コンパイル時間 | 1,576 ms |
コンパイル使用メモリ | 174,440 KB |
実行使用メモリ | 276,704 KB |
最終ジャッジ日時 | 2024-10-01 09:31:18 |
合計ジャッジ時間 | 9,343 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 55 |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i,j,n) for(int i=j;i<n;++i) #define all(i) i.begin(),i.end() #define rall(i) i.rbegin(), i.rend() #define INF 1e9 #define LINF 1e18 const int mod = 1e9 + 7; typedef long long i64; typedef pair<int, int> pi; template <class T> using vt = vector<T>; template <class T> using vvt = vector<vector<T>>; i64 gcd(i64 n, i64 m) {return (m == 0? n : gcd(m, n % m));} i64 lcm(i64 n, i64 m) {return (n / gcd(n, m) * m);} int dx[] = {1, 0, -1, 0}; int dy[] = {0, 1, 0, -1}; template <std::int_fast64_t MOD> class ModInt { private: std::int_fast64_t value; public: ModInt() : value(0) {} ModInt(std::int_fast64_t x) : value(x % MOD) { if(value < 0) value += MOD; } ModInt &operator+=(const ModInt &x) { value += x.value; if(value >= MOD) value -= MOD; return *this; } ModInt &operator-=(const ModInt &x) { if(value < x.value) value += MOD; value -= x.value; return *this; } ModInt &operator*=(const ModInt &x) { value = value * x.value % MOD; return *this; } ModInt &operator/=(const ModInt &x) { *this *= x.inverse(); return *this; } ModInt operator-() const { return ModInt(-value); } ModInt operator+(const ModInt &x) const { return ModInt(*this) += x; } ModInt operator-(const ModInt &x) const { return ModInt(*this) -= x; } ModInt operator*(const ModInt &x) const { return ModInt(*this) *= x; } ModInt operator/(const ModInt &x) const { return ModInt(*this) /= x; } bool operator==(const ModInt *x) const { return value == x.value; } bool operator!=(const ModInt *x) const { return value != x.value; } ModInt inverse() const { std::int_fast64_t a = value, b = MOD, u = 1, v = 0, t; while(b > 0) { t = a / b; std::swap(a -= t * b, b); std::swap(u -= t * v, v); } return ModInt(u); } ModInt pow(int64_t n) const { ModInt ret(1), mul(value); while(n > 0) { if(n & 1) ret *= mul; mul *= mul; n >>= 1; } return ret; } friend std::ostream &operator<<(std::ostream &os, const ModInt &x) { return os << x.value; } friend std::istream &operator>>(std::istream &is, ModInt &x) { std::int_fast64_t t; is >> t; x = ModInt<MOD>(t); return is; } static std::int_fast64_t get_mod() { return MOD; } }; using modint = ModInt<mod>; int main() { cin.tie(0); ios::sync_with_stdio(false); int n; cin >> n; int l = n + 1; vvt<vt<modint>> dp(l + 1, vvt<modint>(2, vt<modint>(10, modint(0)))); dp[0][0][0] = 1; rep(i, 0, l) { int d = 0; if(i == 0) d = 1; rep(smaller, 0, 2) { rep(j, 0, (smaller ? 9 : d) + 1) { rep(k, 0, 10) { if(j >= k) dp[i + 1][smaller || j < d][j] += dp[i][smaller][k]; } } } } modint ans(0); rep(i, 0, 10) ans += dp[l][0][i] + dp[l][1][i]; cout << ans << endl; }