GO TO ROME

• Problem Description

  
  Rafiq trying to convert roman to numbers. He asks maths teacher to know about the conversion. His maths teacher explained the conversion of roman to numbers. Then Rafiq understands the conversion concepts, by using that he write a C program to do conversion.
  Valid digits are I, V, X, L, C, D, M

• CODING ARENA

• #include <stdio.h>

  #include<string.h>

  int digit(char);

  int main()

  {

    char rom[30];

    int a[30],l,i,k,dec;

    scanf("%s",rom);

    l=strlen(rom);

    for(i=0;i<l;i++)

    {

      switch(rom[i])

      {

        case 'I':a[i]=1;

        break;

        case 'V':a[i]=5;

        break;

        case 'X':a[i]=10;

        break;

        case 'L':a[i]=50;

        break;

        case 'C':a[i]=100;

        break;

        case 'D':dec=dec+500;

        break;

        case 'M':a[i]=1000;

        break;

        default:printf("Invalid choice");

        break;

      }

    }

    k=a[l-1];

    for(i=l-1;i>0;i--)

    {

      if(a[i]>a[i-1])

      {

        k=k-a[i-1];

      }

      if(a[i]<=a[i-1])

      {

        k=k+a[i-1];

      }

    }

    printf("%d",k);

        

    

  
  

  return 0;

  }

• Test Case 1

  
  Input (stdin)

  X
  
  

  Expected Output

  10

• Test Case 2

  
  Input (stdin)

  XIV
  
  

  Expected Output

  14