Submission #2532233
Source Code Expand
#include<cstdio> #define MD 1000000007 #define MAXN 3005 using namespace std; int read(){ char c;int x;while(c=getchar(),c<'0'||c>'9');x=c-'0'; while(c=getchar(),c>='0'&&c<='9') x=x*10+c-'0';return x; } int n,m,f[MAXN][MAXN][2],ans; int main() { n=read();m=read(); f[0][0][1]=1; for(int i=1;i<=n;i++) f[0][i][0]=1; for(int i=0;i<=m-1;i++) for(int j=0;j<=n;j++) for(int k=0;k<=1;k++){ if(j) f[i+1][j][k|(j==1)]=(f[i+1][j][k|(j==1)]+f[i][j][k])%MD; if(j) f[i+1][j-1][k|(j==1)]=(f[i+1][j-1][k|(j==1)]+f[i][j][k])%MD; if(n-j) f[i+1][j][k]=(f[i+1][j][k]+f[i][j][k])%MD; if(n-j) f[i+1][j+1][k]=(f[i+1][j+1][k]+f[i][j][k])%MD; } for(int i=0;i<=n;i++) ans=(ans+f[m][i][1])%MD; printf("%d",ans); return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - Piling Up |
User | stevensonson |
Language | C++14 (GCC 5.4.1) |
Score | 900 |
Code Size | 750 Byte |
Status | AC |
Exec Time | 194 ms |
Memory | 70656 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 900 / 900 | ||||
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, sample_01.txt, sample_02.txt, sample_03.txt, subtask_1_01.txt, subtask_1_02.txt, subtask_1_03.txt, subtask_1_04.txt, subtask_1_05.txt, subtask_1_06.txt, subtask_1_07.txt, subtask_1_08.txt, subtask_1_09.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_13.txt, subtask_1_14.txt, subtask_1_15.txt, subtask_1_16.txt, subtask_1_17.txt, subtask_1_18.txt, subtask_1_19.txt, subtask_1_20.txt, subtask_1_21.txt, subtask_1_22.txt, subtask_1_23.txt, subtask_1_24.txt, subtask_1_25.txt, subtask_1_26.txt, subtask_1_27.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
sample_01.txt | AC | 1 ms | 128 KB |
sample_02.txt | AC | 1 ms | 256 KB |
sample_03.txt | AC | 74 ms | 69248 KB |
subtask_1_01.txt | AC | 33 ms | 14464 KB |
subtask_1_02.txt | AC | 16 ms | 27392 KB |
subtask_1_03.txt | AC | 60 ms | 68992 KB |
subtask_1_04.txt | AC | 55 ms | 38400 KB |
subtask_1_05.txt | AC | 140 ms | 61568 KB |
subtask_1_06.txt | AC | 60 ms | 68992 KB |
subtask_1_07.txt | AC | 68 ms | 64640 KB |
subtask_1_08.txt | AC | 26 ms | 45824 KB |
subtask_1_09.txt | AC | 130 ms | 70144 KB |
subtask_1_10.txt | AC | 194 ms | 70656 KB |
subtask_1_11.txt | AC | 60 ms | 64640 KB |
subtask_1_12.txt | AC | 40 ms | 40064 KB |
subtask_1_13.txt | AC | 55 ms | 68864 KB |
subtask_1_14.txt | AC | 30 ms | 60160 KB |
subtask_1_15.txt | AC | 21 ms | 21632 KB |
subtask_1_16.txt | AC | 70 ms | 69120 KB |
subtask_1_17.txt | AC | 24 ms | 33664 KB |
subtask_1_18.txt | AC | 31 ms | 29824 KB |
subtask_1_19.txt | AC | 35 ms | 68608 KB |
subtask_1_20.txt | AC | 74 ms | 69248 KB |
subtask_1_21.txt | AC | 6 ms | 27136 KB |
subtask_1_22.txt | AC | 14 ms | 68224 KB |
subtask_1_23.txt | AC | 7 ms | 35328 KB |
subtask_1_24.txt | AC | 14 ms | 68224 KB |
subtask_1_25.txt | AC | 1 ms | 256 KB |
subtask_1_26.txt | AC | 14 ms | 68224 KB |
subtask_1_27.txt | AC | 1 ms | 128 KB |