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ZOHO QUESTION-12

QUESTION:

You’re given a number n. If write all the numbers from 1 to n in a paper, we have to find the number of characters written on the paper.For example if n=13, the output should be 18 if n = 101, the output should be 19 

PROGRAM:

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int a,i,j,sum=0;
    scanf("%d",&a);
    i=a;
    int k=9;
    while(k<a && a>9)
    {
       i=i+(a-k);
       k=(k*10)+9;
    }
    printf("%d",i);
}

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