oj.uz

답안 #529627

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
529627 2022-02-23T09:27:28 Z Vimmer Magneti (COCI21_magneti) C++14
0 / 110
 109 ms 4932 KB 
#include <bits/stdc++.h>
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")

#define F first
#define S second
#define PB push_back
#define M ll(1e9 + 7)
#define sz(x) (ll)x.size()
#define N 100005
#define pri(x) cout << x << endl
#define endl '\n'
#define all(x) (x).begin(), (x).end()
#define _ << " " <<

using namespace std;
//typedef tree <ll, null_type, less_equal <ll> , rb_tree_tag, tree_order_statistics_node_update> ordered_set;
//using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef short int si;
typedef unsigned long long ull;


int mlt(int x, int y)
{
    return 1ll * x * y % M;
}

int sm(int x, int y)
{
    x += y;

    if (x >= M)
        x -= M;

    return x;
}

int fact[N];

int binpow(int a, int b)
{
    if (b == 0)
        return 1;

    int s = binpow(a, b >> 1);

    s = mlt(s, s);

    if (b & 1)
        s = mlt(s, a);

    return s;
}

int C(int n, int k)
{
    return mlt(fact[n], binpow(mlt(fact[k], fact[n - k]), M - 2));
}

int ans, n, l;

int dp[55][10500];
int lst[55][10500];

int main()
{
    istream::sync_with_stdio(0); ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

//    freopen("1.in", "r", stdin);

    fact[0] = 1;

    for (int i = 1; i < N; i++)
        fact[i] = mlt(fact[i - 1], i);

    cin >> n >> l;

    vector <int> r(n);

    for (int i = 0; i < n; i++)
        cin >> r[i];

    sort(all(r));

    lst[0][0] = 1;

    for (int i = 0; i < n; i++)
    {
        memset(dp, 0, sizeof dp);

        for (int j = 1; j <= i + 1; j++)
            for (int k = 1; k <= l; k++)
            {
                dp[j][k] = lst[j - 1][k - 1];

                if (k >= r[i])
                    dp[j][k] = sm(dp[j][k], mlt(j + j, lst[j][k - r[i]]));

                if (k + 1 >= r[i] + r[i])
                    dp[j][k] = sm(dp[j][k], mlt(j * (j + 1), lst[j + 1][k - r[i] - r[i] + 1]));
            }

        lst[0][0] = 0;

        for (int j = 1; j <= i + 1; j++)
            for (int k = 0; k <= l; k++)
                {
                    lst[j][k] = dp[j][k];
                }
    }

    for (int u = 1; u <= l; u++)
        ans = sm(ans, lst[1][u]);

    pri(ans);
}

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 109 ms 4932 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 10 ms 3276 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 5 ms 3020 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 109 ms 4932 KB Output isn't correct
2 Halted 0 ms 0 KB -