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Cod sursa(job #806814)
#include<fstream>
using namespace std;
int main()
{
ifstream fin("cifra.in");
ofstream fout("cifra.out");
int c[10],m,k=0,j=0,suma=0;
long long int N;
fin>>N;
fin>>m;
while(N)
{
c[k]=N%10;
N/=10;
suma=suma+c[k];
k++;
}
long long int sir2[suma];
k--;
for (;k>=0;k--)
{
for( int i=0;i<c[k];i++)
{
sir2[j]=c[k];
j++;
}
}
fout<<sir2[m-1];
return 0;
}