Submission #7096105
Source Code Expand
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<ll, ll> l_l; typedef pair<int, int> i_i; template<class T> inline bool chmax(T &a, T b) { if(a < b) { a = b; return true; } return false; } template<class T> inline bool chmin(T &a, T b) { if(a > b) { a = b; return true; } return false; } #define EPS (1e-7) #define INF (1e9) #define PI (acos(-1)) const ll mod = 1000000007; ll N, M; ll Prev[605][605][2]; ll Next[605][605][2]; int main() { //cout.precision(10); cin.tie(0); ios::sync_with_stdio(false); cin >> N >> M; Prev[1][0][0] = 1; ll minus; while(M--) { if(M == 0) minus = Prev[N][0][0] * N % mod; for(int i = 0; i <= N; i++) { for(int j = 0; j <= N; j++) { for(int k = 0; k <= 1; k++) { Next[i][j][k] = 0; } } } for(ll i = 0; i <= N; i++) { for(ll j = 0; j <= N; j++) { Next[i][j][0] += Prev[i][j][0] * i; Next[i][j][1] += Prev[i][j][0] * j; Next[i][j+1][1] += Prev[i][j][0] * (N - i - j); Next[i+j][0][0] += Prev[i][j][1] * i; Next[i][j][1] += Prev[i][j][1] * j; Next[i][j+1][1] += Prev[i][j][1] * (N - i - j); Next[i][j][0] %= mod; Next[i][j][1] %= mod; Next[i][j+1][1] %= mod; Next[i+j][0][0] %= mod; } } swap(Next, Prev); /* cerr << endl; cerr << M << endl; for(int i = 0; i <= N; i++) { for(int j = 0; j <= N; j++) { cerr << i << " " << j << " " << Prev[i][j][0] << " " << Prev[i][j][1] << endl; } } */ } cerr << minus << endl; cerr << Prev[N][0][1] << endl; //cout << (Prev[N][0][0] - minus + mod) % mod << endl; cout << (Prev[N][0][0] + mod) % mod << endl; return 0; }
Submission Info
Submission Time | |
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Task | F - Road of the King |
User | kort0n |
Language | C++14 (GCC 5.4.1) |
Score | 1000 |
Code Size | 2100 Byte |
Status | AC |
Exec Time | 506 ms |
Memory | 11648 KB |
Judge Result
Set Name | sample | all | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1000 / 1000 | ||||
Status |
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Set Name | Test Cases |
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sample | sample-01.txt, sample-02.txt, sample-03.txt |
all | sample-01.txt, sample-02.txt, sample-03.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, sample-01.txt, sample-02.txt, sample-03.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01-01.txt | AC | 5 ms | 11648 KB |
01-02.txt | AC | 6 ms | 11648 KB |
01-03.txt | AC | 238 ms | 11648 KB |
01-04.txt | AC | 6 ms | 11648 KB |
01-05.txt | AC | 239 ms | 11648 KB |
01-06.txt | AC | 263 ms | 11648 KB |
01-07.txt | AC | 487 ms | 11648 KB |
01-08.txt | AC | 503 ms | 11648 KB |
01-09.txt | AC | 505 ms | 11648 KB |
01-10.txt | AC | 506 ms | 11648 KB |
sample-01.txt | AC | 7 ms | 11648 KB |
sample-02.txt | AC | 307 ms | 11648 KB |
sample-03.txt | AC | 256 ms | 11648 KB |