Faulty Odometer Time Limit : 1 second    Memory Limit : 32768 KB Total Submit : 249    Accepted Submit : 141

Problem You are given a car odometer which displays the miles traveled as an integer. The odometer has a defect, however: it proceeds from the digit 3 to the digit 5, always skipping over the digit 4. This defect shows up in all positions (the one's, the ten's, the hundred's, etc.). For example, if the odometer displays 15339 and the car travels one mile, odometer reading changes to 15350 (instead of 15340). Input Each line of input contains a positive integer in the range 1..999999999 which represents an odometer reading. (Leading zeros will not appear in the input.) The end of input is indicated by a line containing a single 0. You may assume that no odometer reading will contain the digit 4. Output Each line of input will produce exactly one line of output, which will contain: the odometer reading from the input, a colon, one blank space, and the actual number of miles traveled by the car. Sample input 13 15 2003 2005 239 250 1399 1500 999999 0 Sample output 13: 12 15: 13 2003: 1461 2005: 1462 239: 197 250: 198 1399: 1052 1500: 1053 999999: 531440

#include<cstdio>

#include<string>

#include<cmath>

using namespace std;

int main()

{

       char a[11], temp[11];

       int n, sum;

       int i, j, k;

       while(scanf("%s", a)!=EOF) {

              sum=0;

              n=strlen(a);

              if(n==1 && a[0]=='0') break;

              for(i=0; i<n; i++) {

                     temp[i]=a[i]-48;

                     //if(temp[i]>4) temp[i]--;                    

              }    

              for(i=0; i<n-1; i++) {

                     if(temp[i]<4)   sum=sum+temp[i]*(int)pow(double(9), double(n-i-1));

                     else sum=sum+(temp[i]-1)*(int)pow(double(9), double(n-i-1));

              }

              if(temp[n-1]>4) sum=sum+temp[n-1]-1;

              else sum=sum+temp[n-1];

                    

             

              printf("%s: %d\n", a, sum);

       }

       return 0;

}