• + 1 comment

    not able to minimize the running time. plz help....

    include

    include

    include

    include

    include

    using namespace std;

    int main() { /* Enter your code here. Read input from STDIN. Print output to STDOUT */
    long long int L,R,i,sum=0; int sum1,sum2,n,x,k,j,t; int a[18];
    cin>>L>>R>>k; for(i=L;i<=R;i++) { j=i; n=0; while(j!=0) { a[n]=j%10; j=j/10; n++; } if(n<=k) { sum=(sum+i)%1000000007;
    continue; } sum1=0,sum2=0; for(t=0;t

        if(sum1==sum2)
      sum=(sum+i)%1000000007;    
    }
    cout<<sum;
    return 0;
    

    }