Submission #3775218
Source Code Expand
#include <cstdio>
#include <algorithm>
#define ll long long
#define rep(i,j,k) for (i=j;i<=k;i++)
using namespace std;
const int N=2e3+5,mod=1e9+7;
int n,m,l,k,i,j,p,q,ans,g[2][N],s[N];
int main()
{
// freopen("eternal.in","r",stdin);
// freopen("eternal.out","w",stdout);
scanf("%d%d%d",&n,&m,&k);
l=(n+m-1)/(k-1);
g[0][0]=1; p=0; q=1;
rep(i,1,l)
{
swap(p,q);
s[0]=g[q][0];
rep(j,1,n) s[j]=(g[q][j]+s[j-1])%mod;
rep(j,0,min(n,k-1)) g[p][j]=s[j];
rep(j,k,n) g[p][j]=(s[j]-s[j-k]+mod)%mod;
rep(j,1,n)
if ( j%(k-1)==n%(k-1) && (k-1-j%(k-1))%(k-1)==(m-1)%(k-1) && (k-1)*i-j<=m-1)
ans=((ll)ans+mod+g[p][j]+s[j-1]-s[j])%mod;
}
printf("%d\n",ans);
return 0;
}
Submission Info
Submission Time
2018-12-11 20:40:54+0900
Task
E - Eternal Average
User
Bubble
Language
C++14 (GCC 5.4.1)
Score
1600
Code Size
708 Byte
Status
AC
Exec Time
139 ms
Memory
128 KB
Compile Error
./Main.cpp: In function ‘int main()’:
./Main.cpp:12:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%d",&n,&m,&k);
^
Judge Result
Set Name
Sample
All
Score / Max Score
0 / 0
1600 / 1600
Status
Set Name
Test Cases
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
128 KB
02.txt
AC
139 ms
128 KB
03.txt
AC
1 ms
128 KB
04.txt
AC
1 ms
128 KB
05.txt
AC
57 ms
128 KB
06.txt
AC
1 ms
128 KB
07.txt
AC
13 ms
128 KB
08.txt
AC
1 ms
128 KB
09.txt
AC
3 ms
128 KB
10.txt
AC
3 ms
128 KB
11.txt
AC
1 ms
128 KB
12.txt
AC
1 ms
128 KB
13.txt
AC
1 ms
128 KB
14.txt
AC
1 ms
128 KB
15.txt
AC
1 ms
128 KB
16.txt
AC
1 ms
128 KB
17.txt
AC
1 ms
128 KB
18.txt
AC
1 ms
128 KB
19.txt
AC
72 ms
128 KB
20.txt
AC
14 ms
128 KB
21.txt
AC
1 ms
128 KB
22.txt
AC
12 ms
128 KB
23.txt
AC
2 ms
128 KB
24.txt
AC
2 ms
128 KB
s1.txt
AC
1 ms
128 KB
s2.txt
AC
1 ms
128 KB
s3.txt
AC
1 ms
128 KB