Submission #3171455
Source Code Expand
#include <bits/stdc++.h> using namespace std; const int N=4e3+50, mod=1e9+7; inline int add(int x,int y) {return (x+y>=mod) ? (x+y-mod) : (x+y);} inline int dec(int x,int y) {return (x-y<0) ? (x-y+mod) : (x-y);} int n,m,k,ans,s[N],f[N]; int main() { cin>>n>>m>>k; for(int i=0;i<=m;i++) s[i]=1; for(int i=1;i<=(n+m)/(k-1);++i) { for(int j=1;j<=m;++j) { f[j]=dec(s[j-1],(j>=k) ? s[j-k] : 0); if((j%(k-1))==(m%(k-1)) && 1+i*(k-1)-j<=n && ((1+i*(k-1)-j)%(k-1))==(n%(k-1))) ans=add(ans,f[j]); } for(int j=1;j<=m;j++) f[j]=add(f[j-1],f[j]), s[j]=add(s[j],f[j]); } cout<<ans<<'\n'; }
Submission Info
Submission Time | |
---|---|
Task | E - Eternal Average |
User | DZYO |
Language | C++14 (GCC 5.4.1) |
Score | 1600 |
Code Size | 614 Byte |
Status | AC |
Exec Time | 91 ms |
Memory | 256 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1600 / 1600 | ||||
Status |
|
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Set Name | Test Cases |
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Sample | s1.txt, s2.txt, s3.txt |
All | 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, 24.txt, s1.txt, s2.txt, s3.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01.txt | AC | 1 ms | 256 KB |
02.txt | AC | 91 ms | 256 KB |
03.txt | AC | 1 ms | 256 KB |
04.txt | AC | 1 ms | 256 KB |
05.txt | AC | 43 ms | 256 KB |
06.txt | AC | 14 ms | 256 KB |
07.txt | AC | 1 ms | 256 KB |
08.txt | AC | 2 ms | 256 KB |
09.txt | AC | 3 ms | 256 KB |
10.txt | AC | 3 ms | 256 KB |
11.txt | AC | 1 ms | 256 KB |
12.txt | AC | 1 ms | 256 KB |
13.txt | AC | 2 ms | 256 KB |
14.txt | AC | 1 ms | 256 KB |
15.txt | AC | 2 ms | 256 KB |
16.txt | AC | 1 ms | 256 KB |
17.txt | AC | 1 ms | 256 KB |
18.txt | AC | 2 ms | 256 KB |
19.txt | AC | 4 ms | 256 KB |
20.txt | AC | 10 ms | 256 KB |
21.txt | AC | 1 ms | 256 KB |
22.txt | AC | 9 ms | 256 KB |
23.txt | AC | 2 ms | 256 KB |
24.txt | AC | 2 ms | 256 KB |
s1.txt | AC | 1 ms | 256 KB |
s2.txt | AC | 1 ms | 256 KB |
s3.txt | AC | 1 ms | 256 KB |