fork download
copy 
  1. #include<iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5. int countValue(int number, int value) {
  6.     int count =0;
  7.     int curentIndex = 0;
  8.     int currentValue = 0;
  9.     int beforeValue = 0;
  10.     int afterValue = 0;
  11.     while(pow(10, curentIndex) < number) {
  12.         currentValue = static_cast<int>(number/pow(10, curentIndex))%10;
  13.         beforeValue = static_cast<int>(number/pow(10, (curentIndex + 1)));
  14.         afterValue = number % static_cast<int>(pow(10, curentIndex));
  15.  
  16.         if(currentValue == value) {
  17.             count += beforeValue * pow(10, curentIndex) + afterValue + 1;
  18.         } else if(currentValue < value) {
  19.             count += beforeValue * pow(10, curentIndex);
  20.         } else {
  21.             count += (beforeValue + 1) * pow(10, curentIndex);
  22.         }
  23.         curentIndex++;
  24.     }
  25.     return count;
  26. }
  27.  
  28. int main()
  29. {
  30.     int a, b;
  31.     cout <<"Sample Input\n";
  32.     cin >> a >> b;
  33.     cout <<"Sample Output\n";
  34.     cout << (countValue(b,3) + countValue(b,6) + countValue(b,9) 
  35.             - countValue((a-1),3) - countValue((a-1),6) - countValue((a-1),9));
  36.     return 0;
  37. }
Success #stdin #stdout 0.01s 5328KB
comments (?)
stdin
copy 
999999
10000000
stdout
copy 
Sample Input
Sample Output
19200006
https://ideone.com/MciA61
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!