Submission #1001267
Source Code Expand
using System;
using System.Text;
using System.Collections.Generic;
class Solve{
int N,M;
public Solve(){}
StringBuilder sb;
public static int Main(){
new Solve().Run();
return 0;
}
void Run(){
sb = new StringBuilder();
Read();
Calc();
Console.Write(sb.ToString());
}
void Calc(){
long[,,] d = new long[M+1,N,N+1];
for(int i=0;i<M+1;i++){
for(int j=0;j<N;j++){
for(int k=0;k<N+1;k++){
if(i == 0){
if(j == 0 && k == 0){
d[i,j,k] = 1;
}
else{
d[i,j,k] = 0;
}
}
else{
d[i,j,k] = 0;
}
}
}
}
for(int i=1;i<M+1;i++){
for(int j=0;j<N;j++){
for(int k=j;k<N+1;k++){
if(k != 0){
d[i,j,k] = (d[i,j,k] + (d[i-1,j,k] * (k-j-1) % Define.mod)) % Define.mod;
d[i,k-1,k] = (d[i,k-1,k] + (d[i-1,j,k] * (j+1) % Define.mod)) % Define.mod;
}
if(k != N){
if(k == 0){
d[i,j,k+1] = (d[i,j,k+1] + d[i-1,j,k]) % Define.mod;
}
else{
d[i,j,k+1] = (d[i,j,k+1] + (d[i-1,j,k] * (N-k) % Define.mod)) % Define.mod;
}
}
}
}
}
sb.Append(d[M,N-1,N]+"\n");
}
void Read(){
string[] str = Console.ReadLine().Split(' ');
N = int.Parse(str[0]);
M = int.Parse(str[1])+1;
}
}
public static class Define{
public const long mod = 1000000007;
}
Submission Info
Submission Time |
|
Task |
F - Road of the King |
User |
leign |
Language |
C# (Mono 4.6.2.0) |
Score |
1000 |
Code Size |
1981 Byte |
Status |
AC |
Exec Time |
2200 ms |
Memory |
215768 KB |
Judge Result
Set Name |
sample |
all |
Score / Max Score |
0 / 0 |
1000 / 1000 |
Status |
|
|
Set Name |
Test Cases |
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 |
Case Name |
Status |
Exec Time |
Memory |
01-01.txt |
AC |
20 ms |
2776 KB |
01-02.txt |
AC |
20 ms |
2776 KB |
01-03.txt |
AC |
21 ms |
2776 KB |
01-04.txt |
AC |
36 ms |
4824 KB |
01-05.txt |
AC |
23 ms |
3032 KB |
01-06.txt |
AC |
218 ms |
21592 KB |
01-07.txt |
AC |
2049 ms |
201176 KB |
01-08.txt |
AC |
2169 ms |
212952 KB |
01-09.txt |
AC |
2184 ms |
214360 KB |
01-10.txt |
AC |
2200 ms |
215768 KB |
sample-01.txt |
AC |
20 ms |
2776 KB |
sample-02.txt |
AC |
576 ms |
56152 KB |
sample-03.txt |
AC |
1110 ms |
109912 KB |