Submission #2124513


Source Code Expand

#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<algorithm>
using namespace std;

const int N=2005;
const int MOD=1000000007;

int n,k,f[N][N][3];

void updata(int &x,int y)
{
	x+=y;x-=x>=MOD?MOD:0;
}

int main()
{
	scanf("%d%d",&n,&k);
	f[n+1][0][2]=1;
	for (int i=n+1;i>1;i--)
	{
		for (int j=n;j>=0;j--) updata(f[i][j][1],f[i][j+1][1]);
		for (int j=0;j<=n;j++)
			for (int t=1;t<=2;t++)
			{
				updata(f[i-1][j+1][2],f[i][j][t]);
				updata(f[i-1][j][1],f[i][j][t]);
			}
	}
	int ans=f[1][n-k][1];
	for (int j=1;j<=n-k-1;j++) updata(ans,ans);
	printf("%d",ans);
	return 0;
}

Submission Info

Submission Time
Task F - Solitaire
User beginend
Language C++14 (GCC 5.4.1)
Score 1200
Code Size 646 Byte
Status AC
Exec Time 45 ms
Memory 47360 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:20:21: 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
AC × 3
AC × 26
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 256 KB
00_example_02.txt AC 1 ms 256 KB
00_example_03.txt AC 45 ms 47360 KB
01.txt AC 1 ms 256 KB
02.txt AC 16 ms 26240 KB
03.txt AC 1 ms 384 KB
04.txt AC 3 ms 4864 KB
05.txt AC 1 ms 256 KB
06.txt AC 1 ms 256 KB
07.txt AC 1 ms 384 KB
08.txt AC 1 ms 512 KB
09.txt AC 41 ms 45312 KB
10.txt AC 1 ms 256 KB
11.txt AC 1 ms 256 KB
12.txt AC 40 ms 45312 KB
13.txt AC 2 ms 2816 KB
14.txt AC 44 ms 47360 KB
15.txt AC 6 ms 13440 KB
16.txt AC 45 ms 47360 KB
17.txt AC 45 ms 47360 KB
18.txt AC 45 ms 47360 KB
19.txt AC 45 ms 47360 KB
20.txt AC 45 ms 47360 KB
21.txt AC 1 ms 256 KB
22.txt AC 45 ms 47360 KB
23.txt AC 45 ms 47360 KB