providing in puts to code vita

7/31/2019 Providing in Puts to Code Vita

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Providing Inputs to CodeVita

Contents

Background .......................................................................................................................................... 2

Pre-requisites before deep-diving into understanding input specifications ............................................ 2

Understanding input specifications ....................................................................................................... 3

Important Points ................................................................................................................................... 6


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BackgroundThe purpose of this document is to help CodeVita participants understand how to provide inputs to

CodeVita Code Evaluation Platform. Far too many submissions from Practice round have ended in

Compile Time errors and Run Time errors. In that sense, consider this document as a continuation to

previous document titled Common Mistakes in using CodeVita Code Evaluation Platform. This

earlier document is available for download from CodeVita portal (http://tcscodevita.com) as well as

on Campus Commune at https://nextstep.tcs.com

This document provides a sample problem text and provides its solution in C/C++/Java and C#. This

will help participants to understand how to provide input to CodeVita.

Pre-requisites before deep-diving into understanding input specifications

1. You should have read and understood the following documentsa. CodeVita User Manualb.

Common Mistakes in using CodeVita Code Evaluation Platform

2. You have understood the problem statement correctly i.e.a. Understood how to give inputs to this particular problemb. Understood what should be the output formatc. Understood what is to be computed from your program

3. You are aware that CodeVita platforma. Compiles your source code (provided in single source file) and runs a battery of test

cases against it.

b. For running a battery of test cases against your program, CodeVita platform requiresthat input specifications are adhered to.

c. After a test case has been run, CodeVita platform needs to decide if the output fromyour program is the correct output. For this reason, output specifications need to be

adhered to

4. You are aware that no human user sees the program and everything from compilingprograms to declaring status, is automated.

5. You understand what different status messages that CodeVita provides, mean.


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Understanding input specifications

Lets understand the specification in context of a problem. The problem is as stated below.

Problem C

Sum Of Number(Simple Problem)

Problem Statement:

Write a program to calculate the sum of n numbers and print the sum.

Input Format

Line 1 An integer n - the number of integers to be

added.

Line 2 Various integers.

Output Format

Line 1 Single integer which corresponds to sum,

followed by a new line

Sample Inputs and Outputs

Sr.No Input Output

1 3

1

2

3

6

2 3

10

10

10

30

(Note:-Please do not forget to end your program with a new line, else you may get a Compile

Time Error from the Code Evaluation Engine)


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The solutions to these problems which adhere to the input specification are written as shown below

C

#include

#include

int main()

{

int *p,n,i,sum=0;

scanf("%d",&n);

p=(int*) malloc(n*sizeof(int));

for(i=1;i>n;

int *p;

p=new int[n];

for(int i=0;i>p[i];

sum+=p[i];

}

cout


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Java

import java.io.*;

import java.util.Scanner;

public class SumOfNumber {

public static void main(String args[])

{

int n,sum=0,arr[];

Scanner sc=new Scanner(System.in);

n= sc.nextInt();

arr = new int[n];

for(int i=0; i


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Note: - The above snippets are submitted by CodeVita participants who correctly understood and

implemented the input specification. All these programs areAcceptedin the system.

Important Points

1. Note how, C/C++ programs return 0 and end with a new line character.2. Note how programs do not verbosely accept input i.e. there is no text like How many

numbers you want to add? etc. The inputs specifications do not mention asking verbose

questions. These programs do not ask those questions, but still read the input correctly,

because they adhere to the specification.

3. Similarly, for programs which need absolute path of a file as inputs, do not print text likeEnter absolute file path of the input file.

4. Note how, all the program start execution and then block on inputs usinga. scanf() in Cb. cin in C++c. Scanner.nextXXX() in Java and,d. Console.ReadLine() in C#CodeVita platform expects the program to be running for it to provide the inputs. Your

program has to be in a running state before CodeVita engine can give input(s) to it. If your

program expects command-line arguments, then as soon as the program is launched, it willthrow exceptions (because CodeVita does not provide inputs as command line arguments)

and you will receive a Run-Time Error status message.

5. Once you read inputs from console, it is your responsibility to use appropriate functionsfrom your language to convert it into data types needed to solve the problem.

6. Some of the CodeVita problems ask you to read the input file name from console. Youshould use techniques mentioned in points 4 & 5 above and then use appropriate file

handling functions to read the files. You will never be asked to write to your output a file.

Output always has to be printed to the console in specified format.

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