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Cod sursa(job #920955)
#include<fstream>
#define MOD 30103
#include<cstring>
using namespace std;
ifstream f("diviz.in");
ofstream g("diviz.out");
int k,a1,c,j,kk,b1,i,sol,n,b[202][102],ne[202][102],a[11][202][102];
char s[222];
int main()
{
f>>k>>a1>>b1>>(s+1);
n=strlen(s+1);
for(i=1;i<=n;++i)
{
c=s[i]-'0';
for(j=b1;j;--j)
for(kk=0;kk<k;++kk)
b[j][kk]=a[c][j][kk];
for(j=b1;j;--j)
for(kk=0;kk<k;++kk)
{
a[c][j][(10*kk+c)%k]+=ne[j-1][kk];
a[c][j][(10*kk+c)%k]%=MOD;
}
for(j=b1;j;--j)
for(kk=0;kk<k;++kk)
{
a[c][j][kk]=(a[c][j][kk]+MOD-b[j][kk])%MOD;
ne[j][kk]=(ne[j][kk]+a[c][j][kk]+MOD-b[j][kk])%MOD;
}
if(c)
{
if(a[c][1][c%k]==0)
++ne[1][c%k];
a[c][1][c%k]=1;
}
}
for(i=a1;i<=b1;++i)
sol+=ne[i][0],sol%=MOD;
g<<sol<<'\n';
return 0;
}