結果

問題 No.1238 選抜クラス
ユーザー homesentinelhomesentinel
提出日時 2020-09-25 23:13:43
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 121 ms / 2,000 ms
コード長 4,649 bytes
コンパイル時間 1,165 ms
コンパイル使用メモリ 120,804 KB
実行使用メモリ 11,264 KB
最終ジャッジ日時 2024-06-28 07:21:19
合計ジャッジ時間 3,997 ms
ジャッジサーバーID
(参考情報)
judge2 / judge1
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 2 ms
6,812 KB
testcase_01 AC 1 ms
6,820 KB
testcase_02 AC 2 ms
6,944 KB
testcase_03 AC 2 ms
6,944 KB
testcase_04 AC 2 ms
6,944 KB
testcase_05 AC 2 ms
6,940 KB
testcase_06 AC 2 ms
6,940 KB
testcase_07 AC 2 ms
6,940 KB
testcase_08 AC 2 ms
6,944 KB
testcase_09 AC 2 ms
6,944 KB
testcase_10 AC 2 ms
6,940 KB
testcase_11 AC 2 ms
6,944 KB
testcase_12 AC 2 ms
6,940 KB
testcase_13 AC 3 ms
6,944 KB
testcase_14 AC 2 ms
6,944 KB
testcase_15 AC 3 ms
6,944 KB
testcase_16 AC 2 ms
6,944 KB
testcase_17 AC 119 ms
11,264 KB
testcase_18 AC 107 ms
10,752 KB
testcase_19 AC 113 ms
10,880 KB
testcase_20 AC 102 ms
10,496 KB
testcase_21 AC 94 ms
9,984 KB
testcase_22 AC 114 ms
11,264 KB
testcase_23 AC 113 ms
11,264 KB
testcase_24 AC 116 ms
11,264 KB
testcase_25 AC 114 ms
11,264 KB
testcase_26 AC 121 ms
11,264 KB
testcase_27 AC 118 ms
11,264 KB
testcase_28 AC 119 ms
11,264 KB
testcase_29 AC 111 ms
11,008 KB
testcase_30 AC 6 ms
6,940 KB
testcase_31 AC 22 ms
6,940 KB
testcase_32 AC 54 ms
7,808 KB
testcase_33 AC 2 ms
6,940 KB
testcase_34 AC 71 ms
8,832 KB
testcase_35 AC 9 ms
6,944 KB
testcase_36 AC 3 ms
6,940 KB
testcase_37 AC 6 ms
6,944 KB
testcase_38 AC 100 ms
10,368 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 <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <climits>
#include <cstring>
#include <cassert>


using namespace std;
//using namespace atcoder;

#define REP(i, n) for (int i=0; i<(n); ++i)
#define RREP(i, n) for (int i=(int)(n)-1; i>=0; --i)
#define FOR(i, a, n) for (int i=(a); i<(n); ++i)
#define RFOR(i, a, n) for (int i=(int)(n)-1; i>=(a); --i)

#define SZ(x) ((int)(x).size())
#define ALL(x) (x).begin(),(x).end()

#define DUMP(x) cerr<<#x<<" = "<<(x)<<endl
#define DEBUG(x) cerr<<#x<<" = "<<(x)<<" (L"<<__LINE__<<")"<<endl;

template<class T>
ostream &operator<<(ostream &os, const vector<T> &v) {
    os << "[";
    REP(i, SZ(v)) {
        if (i) os << ", ";
        os << v[i];
    }
    return os << "]";
}

template<class T, class U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
    return os << "(" << p.first << " " << p.second << ")";
}

template<class T>
bool chmax(T &a, const T &b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

template<class T>
bool chmin(T &a, const T &b) {
    if (b < a) {
        a = b;
        return true;
    }
    return false;
}

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using P = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;
using vvi = vector<vi>;
using vvll = vector<vll>;

const ll MOD = 1e9 + 7;
const int INF = INT_MAX / 2;
const ll LINF = LLONG_MAX / 2;
const ld eps = 1e-9;


// edit

template<int64_t mod>
class modint {
    int64_t x;

public:
    modint(int64_t x = 0) : x(x < 0 ? ((x % mod) + mod) % mod : x % mod) {}

    const modint operator-() const { return x ? mod - x : 0; }

    modint &operator+=(const modint &rhs) {
        if ((x += rhs.x) >= mod) x -= mod;
        return *this;
    }

    modint &operator-=(const modint &rhs) {
        return *this += -rhs;
    }

    modint &operator*=(const modint &rhs) {
        (x *= rhs.x) %= mod;
        return *this;
    }

    modint &operator/=(const modint &rhs) {
        return *this *= rhs.pow(mod - 2);
    }

    friend const modint operator+(modint lhs, const modint &rhs) {
        return lhs += rhs;
    }

    friend const modint operator-(modint lhs, const modint &rhs) {
        return lhs -= rhs;
    }

    friend const modint operator*(modint lhs, const modint &rhs) {
        return lhs *= rhs;
    }

    friend const modint operator/(modint lhs, const modint &rhs) {
        return lhs /= rhs;
    }

    const modint pow(int64_t n) const {
        modint ret = 1, tmp = *this;
        while (n) {
            if (n & 1) ret *= tmp;
            tmp *= tmp;
            n >>= 1;
        }
        return ret;
    }

    friend bool operator==(const modint &lhs, const modint &rhs) {
        return lhs.x == rhs.x;
    }

    friend bool operator!=(const modint &lhs, const modint &rhs) {
        return !(lhs == rhs);
    }

    friend ostream &operator<<(ostream &os, const modint &a) {
        return os << a.x;
    }

    friend istream &operator>>(istream &is, modint &a) {
        int64_t tmp;
        is >> tmp;
        a = tmp;
        return is;
    }
};

using mint = modint<MOD>;

void solve() {
    int N, K;
    cin >> N >> K;
    vector<int> A(N);
    REP(i, N) cin >> A[i];
    vector<vector<mint>> dp(N + 1, vector<mint>(N * 100 + 1, mint(0)));
    dp[0][0] = 1;
    for (int idx = 0; idx < N; ++idx) {
        for (int i = N - 1; i >= 0; --i) {
            for (int j = N * 100; j >= 0; --j) {
                int ni = i + 1;
                int nj = j + A[idx];
                if (dp[i][j] != 0 && ni <= N && nj <= N * 100) {
                    dp[ni][nj] += dp[i][j];
                }
            }
        }
    }
    mint ans = 0;
    for (int i = 1; i <= N; ++i) {
        for (int j = 0; j <= N * 100; ++j) {
            if (j >= K * i) {
                ans += dp[i][j];
            }
        }
    }
    cout << ans << endl;
}


int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);
//    std::ifstream in("input.txt");
//    std::cin.rdbuf(in.rdbuf());

    solve();


    return 0;
}
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