Skill Rack Daily Challenge Solution - 28/03/2019

Skill Rack

Daily Challenge Solution

Date : 28/03/2019

ProgramID- 8451

Counter from String

The program must accept a string S as the input. The program must maintain a counter which starts from 0 based on the characters in the string. The program must traverse the string and manipulate the counter based on the following conditions.
If the character is I (i.e. uppercase i) the program must increment the counter by 1.
If the character is D the program must decrement the counter by 1.
If the character is R the program must Reset the counter to 0.
Finally, the program must print the value of the counter.

Boundary Condition(s):
1 <= Length of String <= 1000

Input Format:
The first line contains S.

Output Format:
The first line contains the final counter value.

Example Input/Output 1:
Input:
DRIDD

Output:
-1

Explanation:
Counter starts from 0.
For the character D the counter is decremented by 1. So the counter becomes -1.
For the character R the counter is reset to 0.
For the character I the counter is incremented by 1. So the counter becomes 1.
For the character D the counter is decremented by 1. So the counter becomes 0.
For the character D the counter is decremented by 1. So the counter becomes -1.

Example Input/Output 2:
Input:
RDRIDRDIII

Output:
2

Solution:

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#include<stdio.h>
#include <stdlib.h>
int main()
{
    char a[1000];
    int i,n=0;
    scanf("%s",a);
    for(i=0;a[i]!=NULL;i++)
    {
        if(a[i]=='I')
        {
            n++;
        }
        else if(a[i]=='D')
        {
            n--;
        }
        else if(a[i]=='R')
        {
            n=0;
        }
    }
    printf("%d",n);
    return 0;
}

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