結果
| 問題 | No.1407 Kindness | 
| コンテスト | |
| ユーザー |  m_tsubasa | 
| 提出日時 | 2021-02-26 21:27:35 | 
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 16 ms / 2,000 ms | 
| コード長 | 2,437 bytes | 
| コンパイル時間 | 1,990 ms | 
| コンパイル使用メモリ | 199,240 KB | 
| 最終ジャッジ日時 | 2025-01-19 04:47:06 | 
| ジャッジサーバーID (参考情報) | judge2 / judge1 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 2 | 
| other | AC * 36 | 
ソースコード
#include <bits/stdc++.h>
using namespace std;
template <int mod = (int)(1e9 + 7)>
struct ModInt {
  int x;
  constexpr ModInt() : x(0) {}
  constexpr ModInt(int64_t y)
      : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
  constexpr ModInt &operator+=(const ModInt &p) noexcept {
    if ((x += p.x) >= mod) x -= mod;
    return *this;
  }
  constexpr ModInt &operator-=(const ModInt &p) noexcept {
    if ((x += mod - p.x) >= mod) x -= mod;
    return *this;
  }
  constexpr ModInt &operator*=(const ModInt &p) noexcept {
    x = (int)(1LL * x * p.x % mod);
    return *this;
  }
  constexpr ModInt &operator/=(const ModInt &p) noexcept {
    *this *= p.inverse();
    return *this;
  }
  constexpr ModInt operator-() const { return ModInt(-x); }
  constexpr ModInt operator+(const ModInt &p) const noexcept {
    return ModInt(*this) += p;
  }
  constexpr ModInt operator-(const ModInt &p) const noexcept {
    return ModInt(*this) -= p;
  }
  constexpr ModInt operator*(const ModInt &p) const noexcept {
    return ModInt(*this) *= p;
  }
  constexpr ModInt operator/(const ModInt &p) const noexcept {
    return ModInt(*this) /= p;
  }
  constexpr bool operator==(const ModInt &p) const noexcept { return x == p.x; }
  constexpr bool operator!=(const ModInt &p) const noexcept { return x != p.x; }
  constexpr ModInt inverse() const noexcept {
    int a = x, b = mod, u = 1, v = 0, t = 0;
    while (b > 0) {
      t = a / b;
      swap(a -= t * b, b);
      swap(u -= t * v, v);
    }
    return ModInt(u);
  }
  constexpr ModInt pow(int64_t n) const {
    ModInt res(1), mul(x);
    while (n) {
      if (n & 1) res *= mul;
      mul *= mul;
      n >>= 1;
    }
    return res;
  }
  friend constexpr ostream &operator<<(ostream &os, const ModInt &p) noexcept {
    return os << p.x;
  }
  friend constexpr istream &operator>>(istream &is, ModInt &a) noexcept {
    int64_t t = 0;
    is >> t;
    a = ModInt<mod>(t);
    return (is);
  }
  constexpr int get_mod() { return mod; }
};
using mint = ModInt<>;
int len;
string n;
vector<vector<mint>> dp;
int main() {
  cin >> n;
  len = n.size();
  dp.assign(len + 1, vector<mint>(2, 0));
  dp[0][0] = 1;
  for (int i = 0; i < len; ++i) {
    dp[i + 1][1] = 1;
    for (int j = 0; j < 10; ++j) {
      dp[i + 1][1] += dp[i][1] * j;
      if (j <= n[i] - '0') dp[i + 1][!(j == n[i] - '0')] += dp[i][0] * j;
    }
  }
  cout << dp[len][0] + dp[len][1] - 1 << endl;
  return 0;
}
            
            
            
        