How can you fulfill two answer needs in C++17?

Question

Below is the code for the problem where you enter n and it should output the amount of digits if you write the number of 1 to n. Ex: Inputting 15 should output 21 since 123456789101112131415 has 21 digits.

But i also need to fulfill to goal that 50% of my answers of n less than or equal to 10^6. WHat does that mean and how can I achieve that?

#include <stdio.h>
#include <iostream>                                                             

int findCount(int n){
      if (n == 0)
          return 1;
    long long count = 0;
    while (n != 0) {
        count++;
        n /= 10;
    }

    return count;
}

int main(int argc, char * argv[]) {                           

     
    long long num, i, n, g;                                                                    
    std::cin >> num;
    g = 0;

                              
    if(0 < num && num <= 1000000) {                                                 
        for(long long i = 1; i <= num; i++) {                                         
            n = i;
            g = findCount(n) + g;
        }                                                                       
    }                                                                           

    std::cout << g;
    return 0;
                                                                  
}

Answer 1

Could you please provide the exact instructions/requirements?

But i also need to fulfill to goal that 50% of my answers of n less than or equal to 10^6. WHat does that mean and how can I achieve that?

This means nothing.

"50% of my answers of n less than or equal to 10⁶ [does something/have some characteristics]". We need to know what this 50% should do, and what requirements they should fulfill.

Unless... you mean that "50% of my answers of n ARE less than or equal to 10⁶", meaning that you need to list all the number of digits counter from 1 to X, where X ranges from 1 to n, and 50% of your digit counts must be less than 10⁶ and the other 50% higher than 10⁶.

So the following table would list the numbers and number of lines in the green section is the same as the number of lines in the orange section.

x (from 1 to n)	numbers from 1 to x	number of digits
1	1	1
2	12	2
3	123	3
...	123...	...
? - 1	123...(?-1)	999,999
?	132...?	1,000,000
? + 1	123...(?-1)?(?+1)	1,000,001
...	123...	...
END	123...(?-1)?(?+1)...END	END_COUNT

The best option is to check your requirements again.