結果
| 問題 |
No.2857 Div Array
|
| コンテスト | |
| ユーザー |
Today03
|
| 提出日時 | 2024-08-30 05:41:50 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 3,477 bytes |
| コンパイル時間 | 3,535 ms |
| コンパイル使用メモリ | 251,976 KB |
| 実行使用メモリ | 35,740 KB |
| 最終ジャッジ日時 | 2024-08-30 05:41:58 |
| 合計ジャッジ時間 | 7,650 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 11 TLE * 1 -- * 18 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int INF = 1e9 + 10;
const ll INFL = 4e18;
template <typename T>
vector<vector<T>> matMul(const vector<vector<T>> &a, const vector<vector<T>> &b) {
int n = a.size();
vector<vector<T>> ret(n, vector<T>(n));
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
for (int k = 0; k < n; k++) {
ret[i][j] += a[i][k] * b[k][j];
}
}
}
return ret;
}
template <typename T>
vector<vector<T>> matPow(vector<vector<T>> a, ll b) {
int n = a.size();
vector<vector<T>> ret(n, vector<T>(n));
for (int i = 0; i < n; i++) {
ret[i][i] = 1;
}
while (b) {
if (b & 1) {
ret = matMul(ret, a);
}
a = matMul(a, a);
b >>= 1;
}
return ret;
}
template <ll MOD>
struct ModInt {
ll value;
ModInt(ll x = 0) {
if (x >= 0) {
value = x % MOD;
} else {
value = 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;
}
static constexpr ll get_mod() {
return MOD;
}
};
using Mod998 = ModInt<998244353>;
using Mod107 = ModInt<1000000007>;
using mint = Mod998;
int main() {
int N, M, K;
cin >> N >> M >> K;
vector<vector<mint>> mat(M, vector<mint>(M));
for (int i = 1; i <= M; i++) {
for (int j = 1; j <= M; j++) {
if (abs(M / i - M / j) <= K) {
mat[i - 1][j - 1] = 1;
}
}
}
mat = matPow(mat, N - 1);
mint ans = 0;
for (int i = 0; i < M; i++) {
for (int j = 0; j < M; j++) {
ans += mat[i][j];
}
}
cout << ans << endl;
}
Today03