#462433 (C++14) No.1025 Modular Equation

• 問題: No.1025 Modular Equation
• ユーザー: carrot46
• 提出日時: 2020-04-10 23:19:23
• 言語: C++14 (gcc 13.3.0 + boost 1.87.0)
• 結果: WA
• 実行時間: -
• コード長: 3,400 bytes
• コンパイル時間: 1,748 ms
• コンパイル使用メモリ: 175,664 KB
• 実行使用メモリ: 395,264 KB
• 最終ジャッジ日時: 2024-09-16 00:43:00
• 合計ジャッジ時間: 6,269 ms
• ジャッジサーバーID （参考情報）: judge6 / judge4

ファイルパターン	結果
sample	AC * 2 WA * 1
other	AC * 9 WA * 23

ソースコード

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#include <bits/stdc++.h>
#include <iomanip>
using namespace std;
#define reps(i,s,n) for(int i = s; i < n; i++)
#define rep(i,n) reps(i,0,n)
#define Rreps(i,n,e) for(int i = n - 1; i >= e; --i)
#define Rrep(i,n) Rreps(i,n,0)
#define ALL(a) a.begin(), a.end()
#define fi first
#define se second
typedef long long ll;
typedef vector<ll> vec;
typedef vector<vec> mat;
ll N,M,H,W,K,Q,A,B;
string S;
const ll MOD = 998244353;
//const ll MOD = (1e+9) + 7;
const ll INF = 1LL<<60;
typedef pair<ll, ll> P;
class mint{
    public:
        ll x;
        static unsigned long long mod;
        static unsigned long long mod_plus;
        mint(){x = 0;}
        mint(ll _x) : x((_x < 0 ? ((_x += mod_plus) < 0 ? _x + mod_plus : _x) : _x)%mod){}
        /*mint& operator=(const ll &a){
            x = a;
            return *this;
        }*/
        mint operator-(){
            return x == 0 ? 0 : mod - x;
        }
        mint& operator+=(const mint& a){
            if((x += a.x) >= mod) x -= mod;
            return *this;
        }
        mint operator+(const mint& a) const{
            mint res(*this);
            return res += a;
        }
        mint& operator-=(const mint& a){
            if((x -= a.x) < 0) x += mod;
            return *this;
        }
        mint operator-(const mint& a) const{
            mint res(*this);
            return res -= a;
        }
        mint& operator*=(const mint& a){
            (x *= a.x)%=mod;
            return *this;
        }
        /*mint& operator*=(const ll& a){
            mint temp(a);
            return *this *= temp;
        }*/
        mint operator*(const mint& a) const{
            mint res(*this);
            return res *= a;
        }
        /*mint operator*(const ll& a) const{
            mint res(*this);
            return res *= a;
        }*/
        mint pow(unsigned long long pw) const{
            mint res(1), comp(*this);
            while(pw){
                if(pw&1) res *= comp;
                comp *= comp;
                pw >>= 1;
            }
            return res;
        }
        //以下、modが素数のときのみ
        mint inv() const{
            mint res(*this);
            return res.pow(mod - 2);
        }
        mint& operator/=(const mint &a){
            (x *= a.inv().x)%=mod;
            return *this;
        }
        mint operator/(const mint &a) const{
            mint res(*this);
            return res /= a;
        }
};
ostream& operator<<(ostream& os, const mint& a){
    os << a.x;
    return os;
}
unsigned long long mint::mod = int(1e+9) + 7;
unsigned long long mint::mod_plus = (LLONG_MAX / mint::mod) * mint::mod;
typedef vector<mint> vm;
int main() {
    int p, b;
    cin>>p>>N>>K>>b;
    vec a(0);
    int num = 0;
    rep(i,N) {
        int t;
        cin>>t;
        if(t == 0){
            ++num;
        }else{
            a.push_back(t);
        }
    }
    N = a.size();
    mint res;
    if(K % (p - 1) == 0){
        vector<vm> dp(N + 1, vm(p, 0));
        dp[0][0] = 1;
        rep(i,N){
            rep(j, p){
                dp[i+1][(j + a[i])%p] += dp[i][j] * (p - 1);
                dp[i+1][j] += dp[i][j];
            }
        }
        res = dp[N][b];
    }else{
        if(N == 0){
            res = b == 0;
        }else{
            res = 1;
            rep(i, N - 1) res *= p;
        }
    }
    rep(i,num) res *= p;
    cout<<res<<endl;
}
 
 
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