結果
| 問題 |
No.1184 Hà Nội
|
| コンテスト | |
| ユーザー |
Forested
|
| 提出日時 | 2020-08-23 11:17:24 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 4 ms / 2,000 ms |
| コード長 | 2,065 bytes |
| コンパイル時間 | 2,194 ms |
| コンパイル使用メモリ | 192,092 KB |
| 最終ジャッジ日時 | 2025-01-13 12:25:03 |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 27 |
ソースコード
// Template
#include <bits/stdc++.h>
#define rep_override(x, y, z, name, ...) name
#define rep2(i, n) for (int i = 0; i < (n); ++i)
#define rep3(i, l, r) for (int i = (l); i < (r); ++i)
#define rep(...) rep_override(__VA_ARGS__, rep3, rep2)(__VA_ARGS__)
#define per(i, n) for (int i = (n) - 1; i >= 0; --i)
#define all(x) (x).begin(), (x).end()
using namespace std;
using ll = long long;
constexpr int inf = 1001001001;
constexpr ll INF = 3003003003003003003;
template <typename T> inline bool chmin(T& x, const T& y) {if (x > y) {x = y; return 1;} return 0;}
template <typename T> inline bool chmax(T& x, const T& y) {if (x < y) {x = y; return 1;} return 0;}
struct IOSET {IOSET() {cin.tie(0); ios::sync_with_stdio(0); cout << fixed << setprecision(10);}} ioset;
// Mod-Int
constexpr int MOD = 998244353;
struct ModInt {
ll val;
ModInt() = default;
ModInt(ll x) : val(x % MOD + (x < 0 ? MOD : 0)) {}
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 *= x.val) %= MOD; return *this;}
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(ll t) const {
if (!t) return ModInt(1);
ModInt m = pow(t / 2);
m *= m;
if (t & 1) m *= *this;
return m;
}
ModInt inv() const {return pow(MOD - 2);}
ModInt &operator/= (const ModInt &x) {return *this *= x.inv();}
ModInt operator/ (const ModInt &x) const {return ModInt(*this) /= x;}
friend istream &operator>> (istream &is, ModInt &x) {is >> x.val; return is;}
friend ostream &operator<< (ostream &os, const ModInt &x) {os << x.val; return os;}
};
// Main
int main() {
ll n, l;
cin >> n >> l;
cout << ModInt(2).pow((n + l - 1) / l) - ModInt(1) << "\n";
return 0;
}
Forested