CodeGraderBench/CodeGraderBench huggingface dataset:
Problem: Write a C++ program to collect a positive integer n from the user, and then collect n character strings from the user (containing only lower case alphabets and no other characters, not even spaces). The strings need not be of equal length but the maximum length of any string should be 11. The strings should be stored in an appropriate 2D array. Your program should then include the following:

A function string_compare which takes two strings as input and returns 1 if the first string appears before the second string in alphabetical order, -1 if the second string appears before the first in alphabetical order, and 0 if the two strings are equal to each other. Do not use the inbuilt strcmp function.
A function string_sort which sorts the character strings using the mergesort algorithm taught in class. You are recommended to write a recursive implementation. You will automatically lose 50% of the marks for this program if you implemented the sorting within main.
Your program should then print out the strings in sorted alphabetical order, starting from the first to the last. Feel free to refer to the lecture slides for help.

Input Format
integer n, and a set of n character strings


Output Format
Print out the strings in the suggested order, one string on a new line


Constraints
n is a positive integer, n <= 15
For ease of display of the output, the maximum length of any of the strings should be 11, excluding the NULL character
The character strings should contain only lower case alphabets


Sample input and output




Input

Output

4

zebra

lion

tiger

monkey



lion

monkey

tiger

zebra







Note:  

Do not write any C++ statements for printing general messages. For example, the following should NOT be present in your program: 
cout << "Enter a number:",  
cout << "The computed answer is", etc.  


cout should be used to print only the computed final output. In addition, do not print unnecessary spaces unless specified in the program.

Student submission:
#include<iostream>
#include<cstring>
using namespace std;
#define MAX 12
int string_compare(char B1[], char B2[])
{
int p=0;
while(true){
if(B1[p]>B2[p])return -1;
if(B1[p]<B2[p])return 1;
if(B1[p]==0)return 1;
if(B2[p]==0)return -1;
else return 0;
p++;
}
}
void string_sort(char A[][MAX], int N[], int n)
{
char B1[MAX], B2[MAX];
for(int k=0; k<n; k++){
for(int i=0; i<n; i++){
for(int j=0; j<N[i]; j++){
B1[j]=A[i][j]; B2[j]=A[i+1][j];
}
int L=string_compare(B1, B2);
if(L==-1)swap(A[i], A[i+1]);
}
}
}
int main(){
unsigned int n;
cin>>n;
char A[n][MAX];
int N[n];
for(int i=0; i<n; i++)cin>>A[i];
for(int i=0; i<n; i++)N[i]=strlen(A[i]);
string_sort(A, N, n);
for(int i=0; i<n; i++)cout<<A[i]<<endl;
}

Grading criterion: Reading & storing Input
Rating A: Correctly Stores inputs in an appropriate 2D array accounting for max length of 11 for a string & Reads Inputs
Rating B: Doesn't store input correctly in a 2D array but reading input is correct
Rating C: Fails To Read Input strings correctly
Rating D: 0
Assigned grade: A
Problem: Write a C++ program to collect a positive integer n from the user, and then collect n character strings from the user (containing only lower case alphabets and no other characters, not even spaces). The strings need not be of equal length but the maximum length of any string should be 11. The strings should be stored in an appropriate 2D array. Your program should then include the following:

A function string_compare which takes two strings as input and returns 1 if the first string appears before the second string in alphabetical order, -1 if the second string appears before the first in alphabetical order, and 0 if the two strings are equal to each other. Do not use the inbuilt strcmp function.
A function string_sort which sorts the character strings using the mergesort algorithm taught in class. You are recommended to write a recursive implementation. You will automatically lose 50% of the marks for this program if you implemented the sorting within main.
Your program should then print out the strings in sorted alphabetical order, starting from the first to the last. Feel free to refer to the lecture slides for help.

Input Format
integer n, and a set of n character strings


Output Format
Print out the strings in the suggested order, one string on a new line


Constraints
n is a positive integer, n <= 15
For ease of display of the output, the maximum length of any of the strings should be 11, excluding the NULL character
The character strings should contain only lower case alphabets


Sample input and output




Input

Output

4

zebra

lion

tiger

monkey



lion

monkey

tiger

zebra







Note:  

Do not write any C++ statements for printing general messages. For example, the following should NOT be present in your program: 
cout << "Enter a number:",  
cout << "The computed answer is", etc.  


cout should be used to print only the computed final output. In addition, do not print unnecessary spaces unless specified in the program.

Student submission:
#include<iostream>
using namespace std;
bool string_compare(char B1[][12],char B2[][12],int i){
  int j=0;
  while(true){
    if(B1[j
  }
}
void merge(char A[][12],char B1[][12],char B2[][12],int n1,int n2){
  
}
void string_sort(char A[][12],int n){
  if(n>1){
    char B1[n/2][12],B2[n-n/2][12];
    for(int i=0;i<n/2;i++){
       for(int j=0;A[i][j]!='\0';j++) B1[i][j]=A[i][j];
    }
    for(int i=n/2;i<n;i++){
       for(int j=0;A[i][j]!='\0';j++) B2[i-n/2]=A[i][j];
    }
    string_sort(B1,n/2); string_sort(B2,n-n/2);
    merge(A,B1,B2,n/2,n-n/2);
  }
}
int main(){
 int n; cin>>n; char A[n][12];
 for(int i=0;i<n;i++) cin.getline(A[i],12);
   string_sort(A,n);
 for(int i=0;i<n;i++){
    for(int j=0;A[i][j]!=\'0';j++) cout<<A[i][j];
    cout<<endl;
 }
}

Grading criterion: Reading & storing Input
Rating A: Correctly Stores inputs in an appropriate 2D array accounting for max length of 11 for a string & Reads Inputs
Rating B: Doesn't store input correctly in a 2D array but reading input is correct
Rating C: Fails To Read Input strings correctly
Rating D: 0
Assigned grade: B
Problem: Write a C++ program to collect a positive integer n from the user, and then collect n character strings from the user (containing only lower case alphabets and no other characters, not even spaces). The strings need not be of equal length but the maximum length of any string should be 11. The strings should be stored in an appropriate 2D array. Your program should then include the following:

A function string_compare which takes two strings as input and returns 1 if the first string appears before the second string in alphabetical order, -1 if the second string appears before the first in alphabetical order, and 0 if the two strings are equal to each other. Do not use the inbuilt strcmp function.
A function string_sort which sorts the character strings using the mergesort algorithm taught in class. You are recommended to write a recursive implementation. You will automatically lose 50% of the marks for this program if you implemented the sorting within main.
Your program should then print out the strings in sorted alphabetical order, starting from the first to the last. Feel free to refer to the lecture slides for help.

Input Format
integer n, and a set of n character strings


Output Format
Print out the strings in the suggested order, one string on a new line


Constraints
n is a positive integer, n <= 15
For ease of display of the output, the maximum length of any of the strings should be 11, excluding the NULL character
The character strings should contain only lower case alphabets


Sample input and output




Input

Output

4

zebra

lion

tiger

monkey



lion

monkey

tiger

zebra







Note:  

Do not write any C++ statements for printing general messages. For example, the following should NOT be present in your program: 
cout << "Enter a number:",  
cout << "The computed answer is", etc.  


cout should be used to print only the computed final output. In addition, do not print unnecessary spaces unless specified in the program.

Student submission:
#include<iostream>
using namespace std;

int string_compare (char *first, char *second){
int i = 0;
while (true){
if (first[i] == 0 && second[i] == 0) return 0;
if (first[i] == 0) return -1;
if (second[i] == 0) return 1;
if (first[i] < second[i]) return -1;
if (first[i] > second[i]) return 1;
i++;
}
return 0;
}
int main()
{
char arr[100][12];
int n;
cin>>n;
for (int a=0;a<n; a++){
cin>>arr[a];}

char *first, *second;
cin>>first;
cin>>second;
string_compare(first, second);
}

Grading criterion: Reading & storing Input
Rating A: Correctly Stores inputs in an appropriate 2D array accounting for max length of 11 for a string & Reads Inputs
Rating B: Doesn't store input correctly in a 2D array but reading input is correct
Rating C: Fails To Read Input strings correctly
Rating D: 0
Assigned grade: A
Problem: Write a C++ program to collect a positive integer n from the user, and then collect n character strings from the user (containing only lower case alphabets and no other characters, not even spaces). The strings need not be of equal length but the maximum length of any string should be 11. The strings should be stored in an appropriate 2D array. Your program should then include the following:

A function string_compare which takes two strings as input and returns 1 if the first string appears before the second string in alphabetical order, -1 if the second string appears before the first in alphabetical order, and 0 if the two strings are equal to each other. Do not use the inbuilt strcmp function.
A function string_sort which sorts the character strings using the mergesort algorithm taught in class. You are recommended to write a recursive implementation. You will automatically lose 50% of the marks for this program if you implemented the sorting within main.
Your program should then print out the strings in sorted alphabetical order, starting from the first to the last. Feel free to refer to the lecture slides for help.

Input Format
integer n, and a set of n character strings


Output Format
Print out the strings in the suggested order, one string on a new line


Constraints
n is a positive integer, n <= 15
For ease of display of the output, the maximum length of any of the strings should be 11, excluding the NULL character
The character strings should contain only lower case alphabets


Sample input and output




Input

Output

4

zebra

lion

tiger

monkey



lion

monkey

tiger

zebra







Note:  

Do not write any C++ statements for printing general messages. For example, the following should NOT be present in your program: 
cout << "Enter a number:",  
cout << "The computed answer is", etc.  


cout should be used to print only the computed final output. In addition, do not print unnecessary spaces unless specified in the program.

Student submission:
/*
A triangular number counts the number of objects arranged in an equilateral triangle.
It turns out that the nth triangular number is equal to the sum of the n natural numbers from 1 to n. 
A diagram is shown here below. 
Your task is to write a C++ program with a function which returns true if the number is triangular
and false otherwise. 
To get points, the logic of your code needs to be correct, and you must write a function. 
Your code should print 1 if the number is triangular and 0 if it is not triangular. 
*/
#include <iostream>
using namespace std;

bool f(int x){

bool flag=false;

for(int i=1; 2*x-i*(i+1)>=0; i++){
        if(2*x-i*(i+1)==0) flag=true;
}
return flag;
}

int main(){
int x;
cin>>x;
if(f(x)) cout<<"1"<<endl;
else cout<<"0"<<endl;
}

Grading criterion: Reading & storing Input
Rating A: Correctly Stores inputs in an appropriate 2D array accounting for max length of 11 for a string & Reads Inputs
Rating B: Doesn't store input correctly in a 2D array but reading input is correct
Rating C: Fails To Read Input strings correctly
Rating D: 0
Assigned grade: C
Problem: Write a C++ program to collect a positive integer n from the user, and then collect n character strings from the user (containing only lower case alphabets and no other characters, not even spaces). The strings need not be of equal length but the maximum length of any string should be 11. The strings should be stored in an appropriate 2D array. Your program should then include the following:

A function string_compare which takes two strings as input and returns 1 if the first string appears before the second string in alphabetical order, -1 if the second string appears before the first in alphabetical order, and 0 if the two strings are equal to each other. Do not use the inbuilt strcmp function.
A function string_sort which sorts the character strings using the mergesort algorithm taught in class. You are recommended to write a recursive implementation. You will automatically lose 50% of the marks for this program if you implemented the sorting within main.
Your program should then print out the strings in sorted alphabetical order, starting from the first to the last. Feel free to refer to the lecture slides for help.

Input Format
integer n, and a set of n character strings


Output Format
Print out the strings in the suggested order, one string on a new line


Constraints
n is a positive integer, n <= 15
For ease of display of the output, the maximum length of any of the strings should be 11, excluding the NULL character
The character strings should contain only lower case alphabets


Sample input and output




Input

Output

4

zebra

lion

tiger

monkey



lion

monkey

tiger

zebra







Note:  

Do not write any C++ statements for printing general messages. For example, the following should NOT be present in your program: 
cout << "Enter a number:",  
cout << "The computed answer is", etc.  


cout should be used to print only the computed final output. In addition, do not print unnecessary spaces unless specified in the program.

Student submission:
#include<iostream>
using namespace std;
int string_compare (char *first, char * second){
int i = 0;
while (true){
if (first[i] == 0 && second[i] == 0) return 0;
if (first[i] == 0) return +1;
if (second[i] == 0) return -1;
if (first[i] < second[i]) return +1;
if (first[i] > second[i]) return -1;
i++;
}
return 0;
}

int main(){
int n;
cin>>n;
char name[n][12];
for(int i=0;i<n;i++){
cin.getline(name[i], 12);} // terminated by ctrl-Z
cout<<string_compare(name[0], name[1]);}

Grading criterion: Reading & storing Input
Rating A: Correctly Stores inputs in an appropriate 2D array accounting for max length of 11 for a string & Reads Inputs
Rating B: Doesn't store input correctly in a 2D array but reading input is correct
Rating C: Fails To Read Input strings correctly
Rating D: 0
Assigned grade: C
Problem: Write a C++ program to collect a positive integer n from the user, and then collect n character strings from the user (containing only lower case alphabets and no other characters, not even spaces). The strings need not be of equal length but the maximum length of any string should be 11. The strings should be stored in an appropriate 2D array. Your program should then include the following:

A function string_compare which takes two strings as input and returns 1 if the first string appears before the second string in alphabetical order, -1 if the second string appears before the first in alphabetical order, and 0 if the two strings are equal to each other. Do not use the inbuilt strcmp function.
A function string_sort which sorts the character strings using the mergesort algorithm taught in class. You are recommended to write a recursive implementation. You will automatically lose 50% of the marks for this program if you implemented the sorting within main.
Your program should then print out the strings in sorted alphabetical order, starting from the first to the last. Feel free to refer to the lecture slides for help.

Input Format
integer n, and a set of n character strings


Output Format
Print out the strings in the suggested order, one string on a new line


Constraints
n is a positive integer, n <= 15
For ease of display of the output, the maximum length of any of the strings should be 11, excluding the NULL character
The character strings should contain only lower case alphabets


Sample input and output




Input

Output

4

zebra

lion

tiger

monkey



lion

monkey

tiger

zebra







Note:  

Do not write any C++ statements for printing general messages. For example, the following should NOT be present in your program: 
cout << "Enter a number:",  
cout << "The computed answer is", etc.  


cout should be used to print only the computed final output. In addition, do not print unnecessary spaces unless specified in the program.

Student submission:
#include<iostream>
#include<cstring>
using namespace std;
int main(){
	int n ;
	cin>>n;
	string s1, s2 , s3, s4,s5,s6,s7,s8,s9,s10,s11;
	getline(cin , s1);
	getline(cin , s2);
	getline(cin , s3);
	getline(cin , s4);
	getline(cin , s5);
	getline(cin , s6);
	getline(cin , s7);
	getline(cin , s8);
	getline(cin , s9);
	getline(cin , s10);
	
		getline(cin , s11);
	for(int i= 97 ;i<124;i++ )
	{
		if(s1[0]==char(i)){cout<<s1<<endl;}
		if(s2[0]==char(i)){cout<<s2<<endl;}
		if(s3[0]==char(i)){cout<<s3<<endl;}
		if(s4[0]==char(i)){cout<<s4<<endl;}
		if(s5[0]==char(i)){cout<<s5<<endl;}
		if(s6[0]==char(i)){cout<<s6<<endl;}
		if(s7[0]==char(i)){cout<<s7<<endl;}
		if(s8[0]==char(i)){cout<<s8<<endl;}
	    if(s9[0]==char(i)){cout<<s9<<endl;}
		if(s10[0]==char(i)){cout<<s10<<endl;}
		if(s11[0]==char(i)){cout<<s11<<endl;}
	}}

Grading criterion: Placeholder for extra marks to be given for any reason
Rating A: Implemented merge sort recursively, Modularity, Extra Functions Defined, some corrective marks for failed testcases
Rating B: No reason for extra marks
Rating C: 0
Rating D: 0
Assigned grade: B
Problem: Write a C++ program to collect a positive integer n from the user, and then collect n character strings from the user (containing only lower case alphabets and no other characters, not even spaces). The strings need not be of equal length but the maximum length of any string should be 11. The strings should be stored in an appropriate 2D array. Your program should then include the following:

A function string_compare which takes two strings as input and returns 1 if the first string appears before the second string in alphabetical order, -1 if the second string appears before the first in alphabetical order, and 0 if the two strings are equal to each other. Do not use the inbuilt strcmp function.
A function string_sort which sorts the character strings using the mergesort algorithm taught in class. You are recommended to write a recursive implementation. You will automatically lose 50% of the marks for this program if you implemented the sorting within main.
Your program should then print out the strings in sorted alphabetical order, starting from the first to the last. Feel free to refer to the lecture slides for help.

Input Format
integer n, and a set of n character strings


Output Format
Print out the strings in the suggested order, one string on a new line


Constraints
n is a positive integer, n <= 15
For ease of display of the output, the maximum length of any of the strings should be 11, excluding the NULL character
The character strings should contain only lower case alphabets


Sample input and output




Input

Output

4

zebra

lion

tiger

monkey



lion

monkey

tiger

zebra







Note:  

Do not write any C++ statements for printing general messages. For example, the following should NOT be present in your program: 
cout << "Enter a number:",  
cout << "The computed answer is", etc.  


cout should be used to print only the computed final output. In addition, do not print unnecessary spaces unless specified in the program.

Student submission:
#include <iostream> 
#include <string>

using namespace std ;

int string_compare(string a , string b)
{
	if(a < b) return 1 ;
	else if (a > b) return -1 ; 
	else return 0;  
}

void string_sort(string A[] , int n )
{	
	for(int j = 0 ; j < n ; j++)
	{
	for(int i = 0 ; i < n-1 ; i++){
		if(string_compare(A[i], A[i+1]) == -1 )
		{
			swap(A[i], A[i+1]);
		}
		else 
		{ continue ; } 	
	}
	}
	
	for (int i = 0 ; i < n ; i++)
	{
		cout << A[i] << endl ; 
	}

} 

int main()
{
int n ; 
cin >> n ; 

string A[n] ;

for(int i =0 ; i < n ; i++)
{
	cin >>A[i] ; 
}

string_sort(A , n) ; 


return 0;
}

Grading criterion: Placeholder for extra marks to be given for any reason
Rating A: Implemented merge sort recursively, Modularity, Extra Functions Defined, some corrective marks for failed testcases
Rating B: No reason for extra marks
Rating C: 0
Rating D: 0
Assigned grade: B
Problem: Write a C++ program to collect a positive integer n from the user, and then collect n character strings from the user (containing only lower case alphabets and no other characters, not even spaces). The strings need not be of equal length but the maximum length of any string should be 11. The strings should be stored in an appropriate 2D array. Your program should then include the following:

A function string_compare which takes two strings as input and returns 1 if the first string appears before the second string in alphabetical order, -1 if the second string appears before the first in alphabetical order, and 0 if the two strings are equal to each other. Do not use the inbuilt strcmp function.
A function string_sort which sorts the character strings using the mergesort algorithm taught in class. You are recommended to write a recursive implementation. You will automatically lose 50% of the marks for this program if you implemented the sorting within main.
Your program should then print out the strings in sorted alphabetical order, starting from the first to the last. Feel free to refer to the lecture slides for help.

Input Format
integer n, and a set of n character strings


Output Format
Print out the strings in the suggested order, one string on a new line


Constraints
n is a positive integer, n <= 15
For ease of display of the output, the maximum length of any of the strings should be 11, excluding the NULL character
The character strings should contain only lower case alphabets


Sample input and output




Input

Output

4

zebra

lion

tiger

monkey



lion

monkey

tiger

zebra







Note:  

Do not write any C++ statements for printing general messages. For example, the following should NOT be present in your program: 
cout << "Enter a number:",  
cout << "The computed answer is", etc.  


cout should be used to print only the computed final output. In addition, do not print unnecessary spaces unless specified in the program.

Student submission:
#include<iostream>
#include<cmath>
using namespace std;

int main (){
double a;
double x;
double p;
int n;
cin >> a >> x >> n;
x=a-0.001;
for(int i=1;i<=n;i++){
p=x;
p=p+pow(-1,i+2)*pow(x,2*i+1);
x=p;}

cout << fixed;
cout.pecision(6);
 cout <<p<<"\n");
cout<< (p-sin(a))/sin(a);

return 0;
}

Grading criterion: Placeholder for extra marks to be given for any reason
Rating A: Implemented merge sort recursively, Modularity, Extra Functions Defined, some corrective marks for failed testcases
Rating B: No reason for extra marks
Rating C: 0
Rating D: 0
Assigned grade: B