結果

問題 No.2605 Pickup Parentheses
ユーザー Jeroen Op de BeekJeroen Op de Beek
提出日時 2024-01-12 21:54:07
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 384 ms / 2,000 ms
コード長 5,054 bytes
コンパイル時間 2,137 ms
コンパイル使用メモリ 210,532 KB
実行使用メモリ 25,088 KB
最終ジャッジ日時 2024-09-30 06:21:48
合計ジャッジ時間 11,483 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
このコードへのチャレンジ
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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 30 ms
23,244 KB
testcase_01 AC 29 ms
23,112 KB
testcase_02 AC 29 ms
23,120 KB
testcase_03 AC 31 ms
23,112 KB
testcase_04 AC 30 ms
23,244 KB
testcase_05 AC 31 ms
23,120 KB
testcase_06 AC 31 ms
23,120 KB
testcase_07 AC 30 ms
23,244 KB
testcase_08 AC 31 ms
23,240 KB
testcase_09 AC 29 ms
23,240 KB
testcase_10 AC 31 ms
23,112 KB
testcase_11 AC 30 ms
23,244 KB
testcase_12 AC 32 ms
23,116 KB
testcase_13 AC 31 ms
23,244 KB
testcase_14 AC 32 ms
23,112 KB
testcase_15 AC 31 ms
23,116 KB
testcase_16 AC 30 ms
23,120 KB
testcase_17 AC 31 ms
23,116 KB
testcase_18 AC 222 ms
24,512 KB
testcase_19 AC 125 ms
24,008 KB
testcase_20 AC 46 ms
23,372 KB
testcase_21 AC 39 ms
23,244 KB
testcase_22 AC 33 ms
23,116 KB
testcase_23 AC 234 ms
24,644 KB
testcase_24 AC 48 ms
23,372 KB
testcase_25 AC 241 ms
24,756 KB
testcase_26 AC 266 ms
24,900 KB
testcase_27 AC 227 ms
24,708 KB
testcase_28 AC 135 ms
24,008 KB
testcase_29 AC 51 ms
23,244 KB
testcase_30 AC 85 ms
23,360 KB
testcase_31 AC 74 ms
23,372 KB
testcase_32 AC 49 ms
23,372 KB
testcase_33 AC 144 ms
24,140 KB
testcase_34 AC 140 ms
24,012 KB
testcase_35 AC 104 ms
23,836 KB
testcase_36 AC 122 ms
23,856 KB
testcase_37 AC 135 ms
23,884 KB
testcase_38 AC 78 ms
23,500 KB
testcase_39 AC 45 ms
23,372 KB
testcase_40 AC 151 ms
24,180 KB
testcase_41 AC 135 ms
24,560 KB
testcase_42 AC 180 ms
24,692 KB
testcase_43 AC 57 ms
23,500 KB
testcase_44 AC 56 ms
23,500 KB
testcase_45 AC 29 ms
23,116 KB
testcase_46 AC 37 ms
23,372 KB
testcase_47 AC 29 ms
23,244 KB
testcase_48 AC 30 ms
23,244 KB
testcase_49 AC 115 ms
23,984 KB
testcase_50 AC 59 ms
23,500 KB
testcase_51 AC 79 ms
23,632 KB
testcase_52 AC 85 ms
23,628 KB
testcase_53 AC 117 ms
23,884 KB
testcase_54 AC 66 ms
23,500 KB
testcase_55 AC 88 ms
23,668 KB
testcase_56 AC 42 ms
23,248 KB
testcase_57 AC 78 ms
23,628 KB
testcase_58 AC 329 ms
25,088 KB
testcase_59 AC 243 ms
24,244 KB
testcase_60 AC 295 ms
24,876 KB
testcase_61 AC 280 ms
24,604 KB
testcase_62 AC 278 ms
24,616 KB
testcase_63 AC 287 ms
24,748 KB
testcase_64 AC 324 ms
24,832 KB
testcase_65 AC 244 ms
24,588 KB
testcase_66 AC 384 ms
25,004 KB
testcase_67 AC 290 ms
24,612 KB
testcase_68 AC 32 ms
23,240 KB
testcase_69 AC 32 ms
23,244 KB
testcase_70 AC 30 ms
23,248 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const int mxN = 1<<20, oo = 1e9;
const long long MD = 998244353;
template<long long MOD=MD> struct mdint {
    int d;
    mdint () {d=0;}
    mdint (long long _d) : d(_d%MOD){
        if(d<0) d+=MOD;
    };
    friend mdint& operator+=(mdint& a, const mdint& o) {
        a.d+=o.d; if(a.d>=MOD) a.d-=MOD;
        return a;
    }
    friend mdint& operator-=(mdint& a, const mdint& o) {
        a.d-=o.d; if(a.d<0) a.d+=MOD;
        return a;
    }
    friend mdint& operator*=(mdint& a, const mdint& o) {
        return a = mdint((ll)a.d*o.d);
    }
    mdint operator*(const mdint& o) const {
        mdint res = *this;
        res*=o;
        return res;
    }
    mdint operator+(const mdint& o) const {
        mdint res = *this;
        res+=o;
        return res;
    }
    mdint operator-(const mdint& o) const {
        mdint res = *this;
        res-=o;
        return res;
    }
    mdint operator^(long long b) const {
        mdint tmp = 1;
        mdint power = *this;
        while(b) {
            if(b&1) {
                tmp = tmp*power;
            }
            power = power*power;
            b/=2;
        }
        return tmp;
    }
    friend mdint operator/=(mdint& a, const mdint& o) {
        a *= (o^(MOD-2));
        return a;
    }
    mdint operator/(const mdint& o) {
        mdint res = *this;
        res/=o;
        return res;
    }
    bool operator==(const mdint& o) { return d==o.d;}
    bool operator!=(const mdint& o) { return d!=o.d;}
    friend istream& operator>>(istream& c, mdint& a) {return c >> a.d;}
    friend ostream& operator<<(ostream& c, const mdint& a) {return c << a.d;}
};
using  mint = mdint<MD>;
const int mxF = 2e6+2;
mint fact[mxF], ifact[mxF];
mint ncr(int a, int b) {
    if(b>a or a<0 or b<0) return 0;
    return fact[a]*ifact[b]*ifact[a-b];
}
void precomp() {
    fact[0]=1;
    for(int i=1;i<mxF;++i) {
        fact[i]=fact[i-1]*i;
    }
    ifact[mxF-1] = mint(1)/fact[mxF-1];
    for(int i=mxF-2;i>=0;--i) {
        ifact[i]=ifact[i+1]*(i+1);
    }
}

typedef mint cd;
void revperm(cd* in, int n) {
    for(int i=0,j=0;i<n;++i) {
        if(i<j) swap(in[i],in[j]);
        for(int k = n >> 1; (j ^= k) < k; k >>= 1);
    }
}
cd w[mxN+1]; // stores w^j for each j in [0,n-1]
void precomp2() {
    w[0] = 1;
    int pw = (MD-1)/mxN;
    w[1] = mint(3)^pw;
    for(int i= 2;i<=mxN;++i) {
        w[i] = w[i-1]*w[1];
    }
}
void fft(cd* in, int n, bool reverse=false) {
    int lg = __lg(n);
    assert(1<<lg == n);
    int stride = mxN/n;
    revperm(in,n);
    for(int s=1;s<=lg;++s) {
        int pw = 1<<s;
        int mstride = stride*(n>>s);
        for(int j=0;j<n;j+=pw) {
            // do FFT merging on out array
            cd* even = in+j, *odd = in+j+pw/2;
            for(int i=0;i<pw/2;++i) {
                cd& power = w[reverse?mxN-mstride*i:mstride*i];
                auto tmp = power*odd[i];
                odd[i] = even[i] - tmp;
                even[i] = even[i] + tmp;
            }
        }
    }
    if(reverse) {
        mint fac = mint(1)/n;
        for(int i=0;i<n;++i) in[i]=in[i]*fac;
    }
}

vector<cd> polymul(vector<cd> a, vector<cd> b) {
    int n = a.size(), m = b.size(), ptwo = 1;
    while(ptwo<(n+m)) ptwo*=2;
    a.resize(ptwo), b.resize(ptwo);
    fft(a.data(),ptwo); 
    fft(b.data(),ptwo);
    for(int i=0;i<ptwo;++i) 
        a[i] = a[i]*b[i];
    fft(a.data(),ptwo,true);
    a.resize(n+m-1);
    return a;
}
mint catalan(int n) {
    if(n%2==1) return 0;
    n/=2;
    return ncr(2*n,n)/(n+1);
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    precomp();
    precomp2();
    int n,m; cin >> n >> m;
    vi ws;
    for(int i=0;i<m;++i) {
        int l,r; cin >> l >> r;
        --l,--r;
        if((r-l+1)%2==0) {
            ws.push_back(r-l+1);
        }
    }
    m = ws.size();
    auto mul = [&](auto&& self, int l, int r) -> vector<mint> {
        if(l==r) return {1};
        // cerr << l << ' ' << r << '\n';
        if(l+1==r) {
            vector<mint> v( (ws[l]/2+1));
            v[ws[l]/2]=mint(0)-catalan(ws[l]);
            v[0]+=1;
            return v;
        }
        auto mid = (l+r)/2;
        return polymul(self(self,l,mid), self(self,mid,r));
    };
    vector<mint> res = mul(mul,0,m);
    // normally: n brackets
    mint ans=0;
    for(int i=0;i<res.size();++i) {
        ans+=catalan(n-i*2)*res[i];
    }
    cout << ans << '\n';
}
0