Submission #2976869
Source Code Expand
#include<cstdio> #include<algorithm> using namespace std; const int mod=1e9+7; int n,k,dp[2010]; int qpow(int x,int n){ int ret=1; while(n){ if(n&1) ret=1ll*ret*x%mod; x=1ll*x*x%mod; n>>=1; } return ret; } int main(){ scanf("%d%d",&n,&k); dp[0]=1; for(int i=1;i<n;i++){ for(int j=i;j;j--){ dp[j]=dp[j-1]+dp[j+1]; if(dp[j]>=mod) dp[j]-=mod; } dp[0]=dp[1]; } printf("%d",1ll*dp[n-k]*qpow(2,max(n-k-1,0))%mod); return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - Solitaire |
User | luogu_bot2 |
Language | C++14 (GCC 5.4.1) |
Score | 1200 |
Code Size | 482 Byte |
Status | AC |
Exec Time | 10 ms |
Memory | 256 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:27:50: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d",1ll*dp[n-k]*qpow(2,max(n-k-1,0))%mod); ^ ./Main.cpp:17:21: 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 |
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Set Name | Test Cases |
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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 | 0 ms | 128 KB |
00_example_02.txt | AC | 0 ms | 128 KB |
00_example_03.txt | AC | 10 ms | 128 KB |
01.txt | AC | 0 ms | 128 KB |
02.txt | AC | 3 ms | 128 KB |
03.txt | AC | 0 ms | 128 KB |
04.txt | AC | 1 ms | 128 KB |
05.txt | AC | 0 ms | 128 KB |
06.txt | AC | 0 ms | 128 KB |
07.txt | AC | 0 ms | 128 KB |
08.txt | AC | 1 ms | 128 KB |
09.txt | AC | 9 ms | 128 KB |
10.txt | AC | 0 ms | 128 KB |
11.txt | AC | 0 ms | 128 KB |
12.txt | AC | 9 ms | 256 KB |
13.txt | AC | 1 ms | 128 KB |
14.txt | AC | 10 ms | 128 KB |
15.txt | AC | 1 ms | 128 KB |
16.txt | AC | 10 ms | 128 KB |
17.txt | AC | 10 ms | 128 KB |
18.txt | AC | 10 ms | 128 KB |
19.txt | AC | 10 ms | 128 KB |
20.txt | AC | 10 ms | 128 KB |
21.txt | AC | 0 ms | 128 KB |
22.txt | AC | 10 ms | 128 KB |
23.txt | AC | 10 ms | 128 KB |