이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <iostream>
using namespace std;
#include <vector>
#define ll long long
#define pll pair<ll,ll>
#define vll vector<ll>
const int siz = 4001;
ll dp[siz][siz];
ll fac[siz];
ll c[siz][siz];
const int mod = 1e9 + 7;
int main()
{
int n, m;
cin >> n >> m;
dp[0][0] = 1;
fac[0] = 1;
for (int i = 1; i < siz; i++) {
fac[i] = (i * fac[i - 1]) % mod;
}
for (int i = 0; i < siz; i++) {
for (int j = 0; j < siz; j++) {
if (j == 0)c[i][j] = 1;
else if (i == 0)c[i][j] = 0;
else c[i][j] = (c[i - 1][j] + c[i - 1][j - 1]) % mod;
}
}
for (int i = 1; i <= m; i++) {
int pile = ((2 * n) / m) + (i <= (2 * n) % m);
for (int j = 0; j <= 2 * n; j++) {
for (int k = 0; k<=j && j+pile>=2*k&& k<=pile; k++) {
dp[i][j] =(dp[i][j]+(((dp[i - 1][j + pile - 2 * k] * ((c[j + pile - 2 * k][j - k] * fac[pile - k]) % mod)) % mod)* c[pile][k]) % mod)%mod;
}
}
}
for (int i = 0; i < n; i++) {
dp[m][0]=(2*dp[m][0])%mod;
}
dp[m][0] = (dp[m][0] * fac[n]) % mod;
cout << dp[m][0];
}
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu
// Tips for Getting Started:
// 1. Use the Solution Explorer window to add/manage files
// 2. Use the Team Explorer window to connect to source control
// 3. Use the Output window to see build output and other messages
// 4. Use the Error List window to view errors
// 5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
// 6. In the future, to open this project again, go to File > Open > Project and select the .sln file
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