結果
問題 |
No.189 SUPER HAPPY DAY
|
ユーザー |
|
提出日時 | 2020-09-04 16:17:23 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 7 ms / 5,000 ms |
コード長 | 3,356 bytes |
コンパイル時間 | 1,081 ms |
コンパイル使用メモリ | 80,236 KB |
最終ジャッジ日時 | 2025-01-14 04:30:28 |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 23 |
ソースコード
#include <iostream> #include <algorithm> #include <vector> #include <string> template <class T> std::vector<T> vec(int len, T elem) { return std::vector<T>(len, elem); } template <int MOD> struct ModInt { using lint = long long; int val; // constructor ModInt(lint v = 0) : val(v % MOD) { if (val < 0) val += MOD; }; // unary operator ModInt operator+() const { return ModInt(val); } ModInt operator-() const { return ModInt(MOD - val); } ModInt inv() const { return this->pow(MOD - 2); } // arithmetic 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; } ModInt pow(lint n) const { auto x = ModInt(1); auto b = *this; while (n > 0) { if (n & 1) x *= b; n >>= 1; b *= b; } return x; } // compound assignment ModInt& operator+=(const ModInt& x) { if ((val += x.val) >= MOD) val -= MOD; return *this; } ModInt& operator-=(const ModInt& x) { if ((val -= x.val) < 0) val += MOD; return *this; } ModInt& operator*=(const ModInt& x) { val = lint(val) * x.val % MOD; return *this; } ModInt& operator/=(const ModInt& x) { return *this *= x.inv(); } // compare bool operator==(const ModInt& b) const { return val == b.val; } bool operator!=(const ModInt& b) const { return val != b.val; } bool operator<(const ModInt& b) const { return val < b.val; } bool operator<=(const ModInt& b) const { return val <= b.val; } bool operator>(const ModInt& b) const { return val > b.val; } bool operator>=(const ModInt& b) const { return val >= b.val; } // I/O friend std::istream& operator>>(std::istream& is, ModInt& x) noexcept { lint v; is >> v; x = v; return is; } friend std::ostream& operator<<(std::ostream& os, const ModInt& x) noexcept { return os << x.val; } }; constexpr int MOD = 1000000009; using mint = ModInt<MOD>; std::vector<mint> calc() { std::string s; std::cin >> s; std::reverse(s.begin(), s.end()); int dsum = 0; // loose, tight auto dp = vec(2, vec(dsum + 1, mint(0))); dp[0][0] = dp[1][0] = 1; for (char c : s) { int d = c - '0'; auto ndp = vec(2, vec(dsum + 10, mint(0))); for (int i = 0; i <= dsum; ++i) { // loose <- loose for (int j = 0; j <= 9; ++j) { ndp[0][i + j] += dp[0][i]; } // tight <- loose for (int j = 0; j < d; ++j) { ndp[1][i + j] += dp[0][i]; } // tight <- tight ndp[1][i + d] += dp[1][i]; } std::swap(dp, ndp); dsum += 9; } return dp[1]; } void solve() { auto dp1 = calc(), dp2 = calc(); int n = std::min(dp1.size(), dp2.size()); mint ans = 0; for (int i = 1; i < n; ++i) ans += dp1[i] * dp2[i]; std::cout << ans << "\n"; } int main() { std::cin.tie(nullptr); std::ios::sync_with_stdio(false); solve(); return 0; }