結果
| 問題 |
No.2529 Treasure Hunter
|
| コンテスト | |
| ユーザー |
Kude
|
| 提出日時 | 2023-11-03 22:19:36 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 21 ms / 2,000 ms |
| コード長 | 3,568 bytes |
| コンパイル時間 | 3,168 ms |
| コンパイル使用メモリ | 272,648 KB |
| 実行使用メモリ | 11,264 KB |
| 最終ジャッジ日時 | 2024-09-25 20:43:38 |
| 合計ジャッジ時間 | 4,363 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 22 |
コンパイルメッセージ
main.cpp:49:6: warning: '{anonymous}::mint {anonymous}::perm(int, int)' defined but not used [-Wunused-function]
49 | mint perm(int n, int k) {
| ^~~~
main.cpp:48:6: warning: '{anonymous}::mint {anonymous}::fact(int)' defined but not used [-Wunused-function]
48 | mint fact(int n) {return Fact[n];}
| ^~~~
main.cpp:44:6: warning: '{anonymous}::mint {anonymous}::icomb(int, int)' defined but not used [-Wunused-function]
44 | mint icomb(int n, int k) {
| ^~~~~
main.cpp:37:6: warning: '{anonymous}::mint {anonymous}::comb(int, int)' defined but not used [-Wunused-function]
37 | mint comb(int n, int k) {
| ^~~~
ソースコード
#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using mint = modint998244353;
constexpr int FACT_SIZE = 1000000;
mint Fact[FACT_SIZE + 1];
mint iFact[FACT_SIZE + 1];
const auto fact_init = [] {
Fact[0] = mint::raw(1);
for(int i = 1; i <= FACT_SIZE; ++i) {
Fact[i] = Fact[i-1] * i;
}
iFact[FACT_SIZE] = Fact[FACT_SIZE].inv();
for(int i = FACT_SIZE; i; --i) {
iFact[i-1] = iFact[i] * i;
}
return false;
}();
mint comb(int n, int k) {
if (k == 0) return mint::raw(1);
assert(n >= 0 && k >= 0);
if (k > n) return mint::raw(0);
return Fact[n] * iFact[n - k] * iFact[k];
}
mint icomb(int n, int k) {
return iFact[n] * Fact[n - k] * Fact[k];
}
mint fact(int n) {return Fact[n];}
mint perm(int n, int k) {
assert(0 <= n);
return Fact[n] * iFact[n - k];
}
template<class T, T (*add)(T, T), T (*zero)(), T (*mul)(T, T), T (*one)(), int N>
struct Mat : array<array<T, N>, N> {
using M = Mat<T, add, zero, mul, one, N>;
void make_identity() {
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
(*this)[i][j] = zero();
}
}
for (int i = 0; i < N; i++) {
(*this)[i][i] = one();
}
}
M& operator+=(const M& rhs) {
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
(*this)[i][j] = add((*this)[i][j], rhs[i][j]);
}
}
return *this;
}
M& operator*=(const M& rhs) {
static M temp;
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
temp[i][j] = zero();
}
}
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
for (int k = 0; k < N; k++) {
temp[i][k] = add(temp[i][k], mul((*this)[i][j], rhs[j][k]));
}
}
}
*this = temp;
return *this;
}
template <class I>
void inplace_pow(I k) {
assert(k >= 0);
static M temp;
temp = *this;
make_identity();
while (k) {
if (k & 1) *this *= temp;
k >>= 1;
if (k) temp *= temp;
}
}
friend ostream& operator<<(ostream& os, const M& A) {
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
os << A[i][j] << " \n"[j + 1 == N];
}
}
return os;
}
};
mint add(mint x, mint y) { return x + y; }
mint zero() { return mint(); }
mint mul(mint x, mint y) { return x * y; }
mint one() { return mint::raw(1); }
using M = Mat<mint, add, zero, mul, one, 3>;
} int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int tt;
cin >> tt;
while(tt--) {
int m, n;
cin >> m >> n;
M a;
a[0] = {1, m, m >= 4 ? m * ll(m - 3) / 2 : 0LL};
a[1] = {1, m - 1, m >= 4 ? (m * ll(m - 3) - 2 * (m - 3)) / 2 : 0LL};
a[2] = {1, m - 2, m >= 4 ? (m * ll(m - 3) - 2 * 2 * (m - 3) + 2) / 2 : 0LL};
a.inplace_pow(n);
mint ans;
rep(j, 3) ans += a[0][j];
cout << ans.val() << '\n';
}
}
Kude