#718711 (C++17) No.1761 Sequence Distance

提出ソース

結果

問題	No.1761 Sequence Distance
ユーザー	heno239
提出日時	2021-11-20 19:44:00
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	804 ms / 8,000 ms
コード長	4,834 bytes
コンパイル時間	2,269 ms
コンパイル使用メモリ	149,740 KB
実行使用メモリ	20,832 KB
最終ジャッジ日時	2023-09-02 16:01:49
合計ジャッジ時間	12,306 ms
ジャッジサーバーID （参考情報）	judge12 / judge13

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テストケース

テストケース表示

入力	結果	実行時間実行使用メモリ
testcase_00	AC	11 ms 20,568 KB
testcase_01	AC	10 ms 20,656 KB
testcase_02	AC	200 ms 20,584 KB
testcase_03	AC	11 ms 20,832 KB
testcase_04	AC	10 ms 20,584 KB
testcase_05	AC	10 ms 20,548 KB
testcase_06	AC	12 ms 20,548 KB
testcase_07	AC	10 ms 20,548 KB
testcase_08	AC	12 ms 20,588 KB
testcase_09	AC	10 ms 20,616 KB
testcase_10	AC	12 ms 20,548 KB
testcase_11	AC	13 ms 20,812 KB
testcase_12	AC	11 ms 20,832 KB
testcase_13	AC	11 ms 20,680 KB
testcase_14	AC	11 ms 20,648 KB
testcase_15	AC	12 ms 20,748 KB
testcase_16	AC	12 ms 20,784 KB
testcase_17	AC	10 ms 20,532 KB
testcase_18	AC	13 ms 20,648 KB
testcase_19	AC	11 ms 20,592 KB
testcase_20	AC	12 ms 20,608 KB
testcase_21	AC	165 ms 20,576 KB
testcase_22	AC	20 ms 20,540 KB
testcase_23	AC	647 ms 20,552 KB
testcase_24	AC	195 ms 20,824 KB
testcase_25	AC	521 ms 20,604 KB
testcase_26	AC	561 ms 20,724 KB
testcase_27	AC	210 ms 20,532 KB
testcase_28	AC	165 ms 20,564 KB
testcase_29	AC	459 ms 20,720 KB
testcase_30	AC	99 ms 20,608 KB
testcase_31	AC	254 ms 20,560 KB
testcase_32	AC	26 ms 20,784 KB
testcase_33	AC	334 ms 20,572 KB
testcase_34	AC	13 ms 20,784 KB
testcase_35	AC	41 ms 20,672 KB
testcase_36	AC	423 ms 20,552 KB
testcase_37	AC	60 ms 20,684 KB
testcase_38	AC	100 ms 20,572 KB
testcase_39	AC	246 ms 20,604 KB
testcase_40	AC	94 ms 20,556 KB
testcase_41	AC	698 ms 20,592 KB
testcase_42	AC	804 ms 20,748 KB
testcase_43	AC	802 ms 20,744 KB
testcase_44	AC	11 ms 20,748 KB

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ソースコード

raw source code

#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
#include<string>
#include<cstdio>
#include<vector>
#include<cmath>
#include<algorithm>
#include<functional>
#include<iomanip>
#include<queue>
#include<ciso646>
#include<random>
#include<map>
#include<set>
#include<bitset>
#include<stack>
#include<unordered_map>
#include<unordered_set>
#include<utility>
#include<cassert>
#include<complex>
#include<numeric>
#include<array>
#include<chrono>
using namespace std;

//#define int long long
typedef long long ll;

typedef unsigned long long ul;
typedef unsigned int ui;
const ll mod = 998244353;
const ll INF = mod * mod;
typedef pair<int, int>P;

#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define Rep(i,sta,n) for(int i=sta;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define per1(i,n) for(int i=n;i>=1;i--)
#define Rep1(i,sta,n) for(int i=sta;i<=n;i++)
#define all(v) (v).begin(),(v).end()
typedef pair<ll, ll> LP;
typedef double ld;
typedef pair<ld, ld> LDP;
const ld eps = 1e-4;
const ld pi = acosl(-1.0);

template<typename T>
void chmin(T& a, T b) {
	a = min(a, b);
}
template<typename T>
void chmax(T& a, T b) {
	a = max(a, b);
}
ll mod_pow(ll x, ll n, ll m = mod) {
	if (n < 0) {
		ll res = mod_pow(x, -n, m);
		return mod_pow(res, m - 2, m);
	}
	if (abs(x) >= m)x %= m;
	if (x < 0)x += m;
	ll res = 1;
	while (n) {
		if (n & 1)res = res * x % m;
		x = x * x % m; n >>= 1;
	}
	return res;
}
struct modint {
	ll n;
	modint() :n(0) { ; }
	modint(ll m) :n(m) {
		if (n >= mod)n %= mod;
		else if (n < 0)n = (n % mod + mod) % mod;
	}
	operator int() { return n; }
};
bool operator==(modint a, modint b) { return a.n == b.n; }
modint operator+=(modint& a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= mod; return a; }
modint operator-=(modint& a, modint b) { a.n -= b.n; if (a.n < 0)a.n += mod; return a; }
modint operator*=(modint& a, modint b) { a.n = ((ll)a.n * b.n) % mod; return a; }
modint operator+(modint a, modint b) { return a += b; }
modint operator-(modint a, modint b) { return a -= b; }
modint operator*(modint a, modint b) { return a *= b; }
modint operator^(modint a, ll n) {
	if (n == 0)return modint(1);
	modint res = (a * a) ^ (n / 2);
	if (n % 2)res = res * a;
	return res;
}

ll inv(ll a, ll p) {
	return (a == 1 ? 1 : (1 - p * inv(p % a, a)) / a + p);
}
modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); }
modint operator/=(modint& a, modint b) { a = a / b; return a; }
const int max_n = 1 << 20;
modint fact[max_n], factinv[max_n];
void init_f() {
	fact[0] = modint(1);
	for (int i = 0; i < max_n - 1; i++) {
		fact[i + 1] = fact[i] * modint(i + 1);
	}
	factinv[max_n - 1] = modint(1) / fact[max_n - 1];
	for (int i = max_n - 2; i >= 0; i--) {
		factinv[i] = factinv[i + 1] * modint(i + 1);
	}
}
modint comb(int a, int b) {
	if (a < 0 || b < 0 || a < b)return 0;
	return fact[a] * factinv[b] * factinv[a - b];
}
modint combP(int a, int b) {
	if (a < 0 || b < 0 || a < b)return 0;
	return fact[a] * factinv[a - b];
}


int dx[4] = { 1,0,-1,0 };
int dy[4] = { 0,1,0,-1 };

ll gcd(ll a, ll b) {
	a = abs(a);
	b = abs(b);
	if (a < b)swap(a, b);
	while (b) {
		ll r = a % b; a = b; b = r;
	}
	return a;
}

template <typename T>
void fwt(vector<T>& f) {
	int n = f.size();
	for (int i = 1; i < n; i <<= 1) {
		for (int j = 0; j < n; j++) {
			if ((j & i) == 0) {
				T x = f[j], y = f[j | i];
				f[j] = x + y, f[j | i] = x - y;
			}
		}
	}
}
template <typename T>
void ifwt(vector<T>& f) {
	int n = f.size();
	for (int i = 1; i < n; i <<= 1) {
		for (int j = 0; j < n; j++) {
			if ((j & i) == 0) {
				T x = f[j], y = f[j | i];
				f[j] = (x + y) / 2, f[j | i] = (x - y) / 2;
			}
		}
	}
}

typedef vector<vector<modint>> mat;
typedef vector<modint> vec;
mat mtmul(mat& A, mat& B) {
	mat C(A.size(), vec(B[0].size()));
	rep(i, (int)A.size()) {
		rep(k, (int)B.size()) {
			rep(j, (int)B[0].size()) {
				C[i][j] += A[i][k] * B[k][j];
			}
		}
	}
	return C;
}
mat mtpow(mat A, ll n) {
	mat B(A.size(), vec(A.size()));
	rep(i, (int)A.size()) {
		B[i][i] = 1;
	}
	while (n > 0) {
		if (n & (ll)1)B = mtmul(B, A);
		A = mtmul(A, A);
		n >>= 1;
	}
	return B;
}

modint dp[1005][50];
modint cop[1005][50];

void solve() {
	int n, m; cin >> n >> m;
	dp[0][0] = 1;
	rep(i, n) {
		rep(j, m + 1)rep(k, 50) {
			if (dp[j][k] == (modint)0)continue;
			for (int ad = -1; ad <= 1; ad++) {
				int nk = abs(k + ad);
				if (j + k <= m) {
					cop[j + k][nk] += dp[j][k];
					if (ad == 0)cop[j + k][nk] += dp[j][k];
				}
			}
		}
		rep(j, m + 1)rep(k, 50) {
			dp[j][k] = cop[j][k];
			cop[j][k] = 0;
		}
	}
	modint ans = dp[m][0];
	cout << ans << "\n";
}



signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	//cout << fixed << setprecision(10);
	//init_f();
	//init();
	//int t; cin >> t; rep(i, t)
	solve();
	return 0;
}

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結果

テストケース

ソースコード