Submission #2123484
Source Code Expand
#include<cstdio>
#include<cstring>
#include<algorithm>
#define fo(i,a,b) for(int i=a;i<=b;i++)
#define fd(i,a,b) for(int i=a;i>=b;i--)
#define N 2010
#define mo 1000000007
#define ll long long
using namespace std;
int n,K,f[N][N][2],ans;
int mi(int x)
{
ll a=1;
fo(i,1,x) a=a*2%mo;
return a;
}
int main()
{
scanf("%d%d",&n,&K);
f[n+1][0][1]=1;
fd(i,n+1,2)
{
fd(j,n,0) (f[i][j][0]+=f[i][j+1][0])%=mo;
fo(j,0,n)
{
fo(k,0,1)
{
(f[i-1][j+1][1]+=f[i][j][k])%=mo;
(f[i-1][j][0]+=f[i][j][k])%=mo;
}
}
}
ans=(ll)f[1][n-K][0]*mi(n-K-1)%mo;
printf("%d\n",ans);
}
Submission Info
Submission Time
2018-02-22 23:07:39+0900
Task
F - Solitaire
User
jacky35
Language
C++14 (GCC 5.4.1)
Score
1200
Code Size
621 Byte
Status
AC
Exec Time
58 ms
Memory
31616 KB
Compile Error
./Main.cpp: In function ‘int main()’:
./Main.cpp:19:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&K);
^
Judge Result
Set Name
Sample
All
Score / Max Score
0 / 0
1200 / 1200
Status
Set Name
Test Cases
Sample
00_example_01.txt, 00_example_02.txt, 00_example_03.txt
All
00_example_01.txt, 00_example_02.txt, 00_example_03.txt, 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt
Case Name
Status
Exec Time
Memory
00_example_01.txt
AC
1 ms
128 KB
00_example_02.txt
AC
1 ms
256 KB
00_example_03.txt
AC
58 ms
31616 KB
01.txt
AC
1 ms
256 KB
02.txt
AC
19 ms
18176 KB
03.txt
AC
1 ms
384 KB
04.txt
AC
2 ms
2944 KB
05.txt
AC
1 ms
128 KB
06.txt
AC
1 ms
128 KB
07.txt
AC
1 ms
256 KB
08.txt
AC
1 ms
384 KB
09.txt
AC
52 ms
30848 KB
10.txt
AC
1 ms
256 KB
11.txt
AC
1 ms
256 KB
12.txt
AC
51 ms
30848 KB
13.txt
AC
2 ms
2944 KB
14.txt
AC
56 ms
31232 KB
15.txt
AC
6 ms
9472 KB
16.txt
AC
57 ms
31616 KB
17.txt
AC
58 ms
31616 KB
18.txt
AC
57 ms
31616 KB
19.txt
AC
58 ms
31616 KB
20.txt
AC
57 ms
31616 KB
21.txt
AC
1 ms
128 KB
22.txt
AC
58 ms
31616 KB
23.txt
AC
58 ms
31616 KB