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Cod sursa(job #464319)
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <algorithm>
#include <vector>
using namespace std;
#define file_in "sandokan.in"
#define file_out "sandokan.out"
#define nmax 5010
#define mod 2000003
int n,k,p;
int comb[2][nmax];
void citire()
{
//freopen(file_in,"r",stdin);
//freopen(file_out,"w",stdout);
scanf("%d %d", &n, &k);
}
void solve()
{
int i,j;
p=n%(k-1);
if (p==0) p=k-1;
//n--;
p--;
printf("%d %d\n", n,p);
//calculeaza combinari
comb[0][0]=1;
int ind=0;
for (i=1;i<=n;++i,ind^=1)
{
comb[ind][0]=1;
for (j=1;j<=i;++j)
comb[ind][j]=(comb[ind^1][j]+comb[ind^1][j-1])%mod;
}
printf("%d", comb[ind^1][p]);
}
int main()
{
citire();
solve();
fclose(stdin);
fclose(stdout);
return 0;
}