結果
| 問題 | No.2279 OR Insertion |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-04-22 01:31:30 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 1,829 ms / 2,000 ms |
| コード長 | 4,071 bytes |
| 記録 | |
| コンパイル時間 | 2,336 ms |
| コンパイル使用メモリ | 204,912 KB |
| 最終ジャッジ日時 | 2025-02-12 12:47:55 |
|
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 * 48 |
ソースコード
#include <bits/stdc++.h>
using namespace std ;
#define fast_input_output ios::sync_with_stdio(false); cin.tie(nullptr);
// #pragma GCC target("avx2")
// #pragma GCC optimize("O3")
#pragma GCC target("avx")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
typedef long long ll ;
typedef long double ld ;
typedef pair<ll,ll> P ;
typedef tuple<ll,ll,ll> TP ;
#define chmin(a,b) a = min(a,b)
#define chmax(a,b) a = max(a,b)
#define bit_count(x) __builtin_popcountll(x)
#define gcd(a,b) __gcd(a,b)
#define lcm(a,b) a / gcd(a,b) * b
#define rep(i,n) for(int i = 0 ; i < n ; i++)
#define rrep(i,a,b) for(int i = a ; i < b ; i++)
#define repi(it,S) for(auto it = S.begin() ; it != S.end() ; it++)
#define pt(a) cout << a << endl
#define DEBUG(...) ; cout << #__VA_ARGS__ << endl ; for(auto x : {__VA_ARGS__}) cout << x << " " ; cout << endl ;
#define DEBUG_LIST(...) cout << #__VA_ARGS__ << endl ; DEBUG_REP(__VA_ARGS__) ;
#define DEBUG_REP(V) cout << "{ " ; repi(itr,V) cout << *itr << ", " ; cout << "}" << endl ;
#define debug(a) cout << #a << " " << a << endl
#define all(a) a.begin(), a.end()
#define endl "\n"
const int mod = 998244353 ;
template< int mod >
struct ModInt {
int x;
ModInt() : x(0) {}
ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
ModInt &operator+=(const ModInt &p) {
if((x += p.x) >= mod) x -= mod;
return *this;
}
ModInt &operator-=(const ModInt &p) {
if((x += mod - p.x) >= mod) x -= mod;
return *this;
}
ModInt &operator*=(const ModInt &p) {
x = (int) (1LL * x * p.x % mod);
return *this;
}
ModInt &operator/=(const ModInt &p) {
*this *= p.inverse();
return *this;
}
ModInt operator-() const { return ModInt(-x); }
ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; }
ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; }
ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; }
ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; }
bool operator==(const ModInt &p) const { return x == p.x; }
bool operator!=(const ModInt &p) const { return x != p.x; }
ModInt inverse() const {
int a = x, b = mod, u = 1, v = 0, t;
while(b > 0) {
t = a / b;
swap(a -= t * b, b);
swap(u -= t * v, v);
}
return ModInt(u);
}
ModInt pow(int64_t n) const {
ModInt ret(1), mul(x);
while(n > 0) {
if(n & 1) ret *= mul;
mul *= mul;
n >>= 1;
}
return ret;
}
friend ostream &operator<<(ostream &os, const ModInt &p) {
return os << p.x;
}
friend istream &operator>>(istream &is, ModInt &a) {
int64_t t;
is >> t;
a = ModInt< mod >(t);
return (is);
}
static int get_mod() { return mod; }
};
using modint = ModInt< mod >;
modint powmod(modint x , ll n){
modint res = 1 ;
while(n > 0){
if(n & 1) (res *= x);
(x *= x);
n >>= 1 ;
}
return res ;
}
int n;
string S;
int main(){
// fast_input_output
cin >> n >> S;
vector<modint> A(n);
rep(i,n) A[i] = S[i] - '0';
modint res = 0;
rrep(i,1,n+1){
vector<vector<modint>> dp(n+1,vector<modint>(2,0));
vector<vector<modint>> sp(n+1,vector<modint>(2,0));
dp[0][0] = 1;
sp[0][0] = 1;
rrep(j,1,n+1){
if(j-i>=0){
dp[j][1] += sp[j-1][1];
if(S[j-i] == '1'){
dp[j][1] += sp[j-i][0];
dp[j][0] += sp[j-1][0] - sp[j-i][0];
}
else{
dp[j][0] += sp[j-1][0];
}
}
else{
dp[j][0] += sp[j-1][0];
}
sp[j][1] = sp[j-1][1] + dp[j][1];
sp[j][0] = sp[j-1][0] + dp[j][0];
}
res += dp[n][1] * powmod(2,i-1);
}
cout << res << endl;
}