結果
| 問題 |
No.3089 Base M Numbers, But Only 0~9
|
| コンテスト | |
| ユーザー |
Today03
|
| 提出日時 | 2025-04-04 22:52:52 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 58 ms / 2,000 ms |
| コード長 | 3,221 bytes |
| コンパイル時間 | 4,237 ms |
| コンパイル使用メモリ | 278,864 KB |
| 実行使用メモリ | 7,720 KB |
| 最終ジャッジ日時 | 2025-04-04 22:53:08 |
| 合計ジャッジ時間 | 4,976 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 5 |
| other | AC * 19 |
ソースコード
#include <bits/stdc++.h>
#define ALL(x) (x).begin(), (x).end()
#define LB(v, x) (int)(lower_bound(ALL(v), x) - (v).begin())
#define UQ(v) sort(ALL(v)), (v).erase(unique(ALL(v)), (v).end())
#define IO ios::sync_with_stdio(false), cin.tie(nullptr);
#define chmax(a, b) (a) = (a) < (b) ? (b) : (a)
#define chmin(a, b) (a) = (a) < (b) ? (a) : (b)
using namespace std;
using ll = long long;
const int INF = 1e9 + 10;
const ll INFL = 4e18;
/// @file modint.hpp
/// @brief ModInt
template <ll MOD>
struct ModInt {
ModInt(ll x = 0) { value = (x >= 0 ? x % MOD : MOD - (-x) % MOD); }
ModInt operator-() const { return ModInt(-value); }
ModInt operator+() const { return ModInt(*this); }
ModInt& operator+=(const ModInt& other) {
value += other.value;
if (value >= MOD) value -= MOD;
return *this;
}
ModInt& operator-=(const ModInt& other) {
value += MOD - other.value;
if (value >= MOD) value -= MOD;
return *this;
}
ModInt& operator*=(const ModInt other) {
value = value * other.value % MOD;
return *this;
}
ModInt& operator/=(ModInt other) {
(*this) *= other.inv();
return *this;
}
ModInt operator+(const ModInt& other) const { return ModInt(*this) += other; }
ModInt operator-(const ModInt& other) const { return ModInt(*this) -= other; }
ModInt operator*(const ModInt& other) const { return ModInt(*this) *= other; }
ModInt operator/(const ModInt& other) const { return ModInt(*this) /= other; }
ModInt pow(ll x) const {
ModInt ret(1), mul(value);
while (x) {
if (x & 1) ret *= mul;
mul *= mul;
x >>= 1;
}
return ret;
}
ModInt inv() const { return pow(MOD - 2); }
bool operator==(const ModInt& other) const { return value == other.value; }
bool operator!=(const ModInt& other) const { return value != other.value; }
friend ostream& operator<<(ostream& os, const ModInt& x) { return os << x.value; }
friend istream& operator>>(istream& is, ModInt& x) {
ll v;
is >> v;
x = ModInt<MOD>(v);
return is;
}
ll val() { return value; }
static constexpr ll get_mod() { return MOD; }
private:
ll value;
};
using Mod998 = ModInt<998244353>;
using Mod107 = ModInt<1000000007>;
using mint = Mod998;
int main() {
ll M;
string S;
cin >> M >> S;
int N = ssize(S);
vector<mint> patan(N);
mint all = 1;
for (int i = 0; i < N; i++) {
ll cnt = M / 10 + (M % 10 > (S[i] - '0'));
if (i == 0 && S[i] == '0') cnt--;
patan[i] = cnt;
all *= cnt;
}
mint ans = 0, minv = mint(2).inv();
for (int i = 0; i < N; i++) {
// 0~patan[i]-1
if (i == 0 && S[i] == '0') {
mint add = mint(S[i] - '0') * patan[i];
add += patan[i] * (patan[i] + 1) * minv * 10;
ans += add * mint(M).pow(N - i - 1) * (all / patan[i]);
} else {
mint add = mint(S[i] - '0') * patan[i];
add += patan[i] * (patan[i] - 1) * minv * 10;
ans += add * mint(M).pow(N - i - 1) * (all / patan[i]);
}
}
cout << ans << endl;
}
Today03