結果
| 問題 |
No.2964 Obstruction Bingo
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-11-16 16:20:54 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 838 ms / 2,468 ms |
| コード長 | 3,648 bytes |
| コンパイル時間 | 2,230 ms |
| コンパイル使用メモリ | 202,708 KB |
| 最終ジャッジ日時 | 2025-02-25 04:33:55 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 49 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template<const unsigned int MOD> struct prime_modint {
using mint = prime_modint;
unsigned int v;
prime_modint() : v(0) {}
prime_modint(unsigned int a) { a %= MOD; v = a; }
prime_modint(unsigned long long a) { a %= MOD; v = a; }
prime_modint(int a) { a %= (int)(MOD); if(a < 0)a += MOD; v = a; }
prime_modint(long long a) { a %= (int)(MOD); if(a < 0)a += MOD; v = a; }
static constexpr int mod() { return MOD; }
mint& operator++() {v++; if(v == MOD)v = 0; return *this;}
mint& operator--() {if(v == 0)v = MOD; v--; return *this;}
mint operator++(int) { mint result = *this; ++*this; return result; }
mint operator--(int) { mint result = *this; --*this; return result; }
mint& operator+=(const mint& rhs) { v += rhs.v; if(v >= MOD) v -= MOD; return *this; }
mint& operator-=(const mint& rhs) { if(v < rhs.v) v += MOD; v -= rhs.v; return *this; }
mint& operator*=(const mint& rhs) {
v = (unsigned int)((unsigned long long)(v) * rhs.v % MOD);
return *this;
}
mint& operator/=(const mint& rhs) { return *this = *this * rhs.inv(); }
mint operator+() const { return *this; }
mint operator-() const { return mint() - *this; }
mint pow(long long n) const {
assert(0 <= n);
mint r = 1, x = *this;
while (n) {
if (n & 1) r *= x;
x *= x;
n >>= 1;
}
return r;
}
mint inv() const { assert(v); return pow(MOD - 2); }
friend mint operator+(const mint& lhs, const mint& rhs) { return mint(lhs) += rhs; }
friend mint operator-(const mint& lhs, const mint& rhs) { return mint(lhs) -= rhs; }
friend mint operator*(const mint& lhs, const mint& rhs) { return mint(lhs) *= rhs; }
friend mint operator/(const mint& lhs, const mint& rhs) { return mint(lhs) /= rhs; }
friend bool operator==(const mint& lhs, const mint& rhs) { return (lhs.v == rhs.v); }
friend bool operator!=(const mint& lhs, const mint& rhs) { return (lhs.v != rhs.v); }
friend std::ostream& operator << (std::ostream &os, const mint& rhs) noexcept { return os << rhs.v; }
};
//using mint = prime_modint<1000000007>;
using mint = prime_modint<998244353>;
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
int l, k;
cin >> l >> k;
string s, t;
cin >> s >> t;
vector<int> a(26);
for(auto &&v : a) cin >> v;
int tot = accumulate(a.begin(), a.end(), 0);
vector<mint> coef(26);
for(int i = 0; i < 26; i++){
coef[i] = mint(a[i]) / tot;
}
mint A, B;
vector dp(1, vector<mint>(1));
dp[0][0] = 1;
for(int i = 0; i < k; i++){
vector ndp(i + 2, vector<mint>(i + 2));
for(int j = 0; j <= i; j++){
int ns = s[j % l] - 'a';
for(int p = max(0, j - l + 1); p <= i && p < j + l; p++){
if(dp[j][p] == 0) continue;
int nt = t[p % l] - 'a';
for(int n = 0; n < 26; n++){
if(coef[n] == 0) continue;
int nj = j, np = p;
if (n == ns) nj++;
if (n == nt) np++;
if(nj - np >= l){
A += coef[n] * dp[j][p];
continue;
}
if(np - nj >= l){
B += coef[n] * dp[j][p];
continue;
}
ndp[nj][np] += coef[n] * dp[j][p];
}
}
}
swap(dp, ndp);
}
cout << A << ' ' << B << '\n';
}