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  1.  
  2. #include <bits/stdc++.h>
  3. #define fi first
  4. #define se second
  5. #define mp make_pair
  6. #define pb push_back
  7. #define mod 1000000007
  8. //#define mod 3
  9. #define ll long long
  10. using namespace std;
  11. ll a[100010],b[100010];
  12. int main()
  13. {
  14. 	ll n,k,a0,an,diff,n0,n1,i,cnt=1;
  15. 	cin>>n>>k;
  16. 	for(i=0;i<n/k;i++)
  17. 		cin>>a[i];
  18. 	for(i=0;i<n/k;i++)
  19. 		cin>>b[i];
  20. 	for(i=0;i<n/k;i++)
  21. 	{
  22. 		an=pow(10,k);
  23. 		diff=an % a[i];
  24. 		if(diff!=0)
  25. 			an=an-diff;
  26. 		else
  27. 			an=an-a[i];
  28. 		a0=0;
  29. 		//diff=a0 % a[i];
  30. 		//if(diff!=0)
  31. 		//	a0=a0+(a[i]-diff);
  32. 		n0=((an-a0)/a[i])+1;
  33.  
  34.  
  35. 		a0=b[i]*pow(10,k-1);
  36. 		diff=a0 % a[i];
  37. 		if(diff !=0)
  38. 			a0=a0+(a[i]-diff);
  39. 		an=((b[i]+1)*pow(10,k-1))-1;
  40. 		diff=an % a[i];
  41. 		if(diff != 0)
  42. 			an=an-diff;
  43. 		n1=((an-a0)/a[i])+1;
  44.  
  45. 		//cout<<n0<<" "<<n1<<endl;
  46. 		cnt=(cnt*((n0-n1)%mod))%mod;
  47. 	}
  48. 	cout<<cnt<<endl;
  49. }
  50.  
Success #stdin #stdout 0s 5024KB
comments (?)
stdin 
8 2
1 22 3 44
5 4 3 2
stdout 
32400
https://ideone.com/FiberQ
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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