CodeGraderBench/CodeGraderBench huggingface dataset:
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include<simplecpp>
main_program{
int n;
cin>>n;
cout<< [n][n]<<endl;
for()
[1][1]==o;
[1][2]==x;
[2][1]==o;
[2][2]==x;


}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: C
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include<simplecpp>
main_program{
        int n;
        cin>>n;
        for(int i=1; i<=n; i++){
                for(int j=1; j<=n; j++){
                        if(i%2==0){
                                if(i>=j) cout<<"x";
                                else if(j%2==0) cout<<"x";
                                else cout<<"o";
                        }
                        else{
                                if(i>=j) cout<<"o";
                                else if(j%2==0) cout<<"x";
                                else cout<<"o";
                        }
                }
                cout<<endl;
        }
}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include<simplecpp>
main_program{ 
 int x=0 ,n ;
 cin >> n ;
 if(n%2 == 0 ){repeat(n/2){if(x%2==0) {repeat(x){cout << "o";}repeat((n-x)/2) { cout <<"o"<<"x";} cout << endl ; x=x+1 ;}
                         if(x%2==1) { repeat(x+1){cout << "x";} repeat((n-x-1)/2){ cout <<"o"<<"x";} cout << endl ; x =x+1 ;} } }
     x=0 ;             
  if(n%2 == 1){repeat((n-1)/2){if(x%2==0) {repeat(x){cout << "o";}repeat((n-x-1)/2) { cout <<"o"<<"x";} cout<<"o" ; cout << endl ; x=x+1 ;}
                         if(x%2==1) { repeat(x+1){cout << "x";} repeat((n-x-2)/2){ cout <<"o"<<"x";} cout<< "o" ; cout << endl ; x =x+1 ;} }
                    repeat(n){cout <<"o" ;} cout << endl ;          
 
 
 
 }
 }

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include<simplecpp>
main_program{
        int n;
        cin>>n;
        char ch1='0',ch2='x';
        int k=1,l=n;
        if(l%2!=0){
                int m=(l-1)/2;
        while(m>=0){
                if(m==0){
                        repeat(k){
                                cout<<ch1;
                        }
                        cout<<endl;
                        break;
                }
                else{
                repeat(k){
                        cout<<ch1;
                }
                repeat(m){
                        cout<<ch2<<ch1;
                }
                cout<<endl;
                repeat(k){
                        cout<<ch2;
                }
                repeat(m){
                        cout<<ch2<<ch1;
                }
                cout<<endl;
                k=k+2;
                m=m-1;
                }
        }
        }
        else{
        int p=2,a=n/2;
        repeat(a){
                cout<<ch1<<ch2;
        }
        cout<<endl;
        a--;
while(a>=0){
                if(a==0){
                        repeat(p){
                                cout<<ch2;
                        }
                        cout<<endl;
                        break;
                }
                else{
        repeat(p){
                cout<<ch2;
        }
        repeat(a){
                cout<<ch1<<ch2;
        }
        cout<<endl;
        repeat(p){
                cout<<ch1;
        }
        repeat(a){
                cout<<ch1<<ch2;
        }
        cout<<endl;
        a--;
        p=p+2;
                }
        }
        }

}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include <simplecpp>
main_program{
    int n,r,j;
    r=1;
    j=1;
cin>>n;
for(r=1;r<=n;r++){
    if(r%2!=0){
        int i=1;
        for(i=1;i<=r;i++){cout<<"o";}
     j=r;
     while(j<n){
        cout<<"x";
        j++;
        if(j==n){break;}
        cout<<"o";
        j++;
     }}
     if(r%2==0){ int i=1;
        for(i=1;i<=r;i++){cout<<"x";}
     j=r;
     while(j<n){
        cout<<"o";
        j++;
        if(j==n){break;}
        cout<<"x";
        j++;
     }
     }
     cout<<endl;
     j=1;
    }
}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include <simplecpp>
main_program{
    int n,j=1,k=1;
    cin>>n;
    for(int i=0;i<n;i++){
        for(int m=0;m<k;m++){
            if (j==1){
                cout<<'o';
            }
            else{
                cout<<'x';
            }
        }
        j*=-1;
        int l=j;
        for(int i=0;i<n-k;i++){
            if (l==1){
                cout<<'o';
            }
            else{
                cout<<'x';
            }
            l*=-1;
        }
        k++;
        cout<<endl;
    }
}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include<simplecpp>
main_program{
    int n;
    cin >> n;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            if(j<=i){
                if(i%2==0){
                    cout << "x";
                }
                else{
                    cout << "o";
                }
            }
            else{
                if(j%2==0){
                    cout << "x";
                }
                else{
                    cout << "o";
                }
            }
        }
        cout << endl;
    }
}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include <simplecpp>
int main(){
	int n; cin>>n;
	for(int i = 1;i<=n;i++){
		for(int j=1;j<=n;j++){
		 if(j<=i){
		 	if(i%2==0) cout<<"x";
		 	else cout<<"o";
		 }
		 else if(j%2==0) cout<< "x"; else cout<<"o";
		} cout<<endl;
	}
}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include<simplecpp>
 main_program{
         int n=2;
          int i=0;
          for( i=0;i<=n;i++){
                    
                           cout<<"ox"<< endl;

                            cout << "xx" << endl;
                            break;
                  }
                   cout<< endl;
          }
            return 0;
 }

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: B
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include <simplecpp>

int XorO(int x, int y){
  if(y > x){return 1- y%2;}
  else {return 1-x%2;}
}

main_program{
int n;
cin >> n;
int x = 1, y = 1;
for(int i=0; i < n*n; i++){
    for(int k = 0; k < n; k++){
       if(XorO(x, y) == 0){cout << "o";}
       if(XorO(x, y) == 1){cout << "x";}
       x++;
       i++;
      }
    cout << endl;
    y++;
    x = 1;
   }
}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include<simplecpp>

main_program{
	int n,col=1,row=1;
	cin>>n;
	while (row<=n){
		if (row%2==0){
			repeat(row){
				cout<<"x";}
			col=row+1;
			while (col<=n){
				if (col%2==0)
					cout<<"x";
				else
					cout<<"o";
				col++;

			}
			cout<<endl;
		}
		else{
			repeat(row){
				cout<<"o";}
				col=row+1;
			while (col<=n){
				if (col%2==0)
					cout<<"x";
				else
					cout<<"o";
				col++;
			}
			cout<<endl;
		}
		row++;
		}
}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include <simplecpp>

main_program{
        int n;
        cin>>n;
        int m=1;
        char c='o';
        repeat(n){
                repeat(m){
                        cout<<c;
                }
                char store=c;
                repeat(n-m){
                        if(c=='o'){
                                c='x';
                        }else{
                                c='o';
                        }
                        cout<<c;
                }
                if(store=='o'){
                        c='x';
                }else{
                        c='o';
                }
                m++;
                cout<<endl;
        }
}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include <simplecpp>

main_program
{
    int n;
    cin>>n;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<=i;j++)
        {
            if(i%2==1)
                cout<<'x';
            else
                cout<<'o';
        }
        for(int j=i+1;j<n;j++)
        {
            if(j%2==1)
                cout<<'x';
            else
                cout<<'o';
        }
        cout<<'\n';
    }
}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A
Problem: Write a program to accept an integer n and print an n x n square grid filled with alternating concentric L-shaped patterns using the characters 'o' and 'x'.

The pattern always starts with the character 'o'.

The next row and column are filled with 'x', forming an L shape flipped on the vertical axis.

Then again with 'o', alternating until the entire grid is filled.

Examples

Input:
4

Output:
oxox
xxox
ooox
xxxx

Input:
7

Output:
oxoxoxo
xxoxoxo
oooxoxo
xxxxoxo
oooooxo
xxxxxxo
ooooooo


Input Format

An integer n.


Output Format

Print the n x n pattern of concentric L shapes using 'o' and 'x'.


Note

- Do not print any extra messages such as:
  cout << "Enter a number"
  cout << "The computed answer is"
- Use cout only to print the computed final output.
- Do not print unnecessary spaces.
- Do not hard-code the output.
- If any test case passes by simply printing with cout and without logic, marks will not be awarded.

Student submission:
#include<simplecpp>
main_program{
int n;
cin>>n;

for(int i=0;i<n;i++){
for(int j=0;j<n;j++){
        if(n%2==0){
        if(i%2==0||j%2==0)
                cout<<"o";
        else
                cout<<"x";}
        if(n%2!=0){
        if(i%2==0||j%2==0)
                cout<<"x";
        else
                cout<<"o";}
}}
cout<<endl;}

Grading criterion: Declaration of variables
Rating A: correctly declares the variable(s) as required

Rating B: Some issue. 

Rating C: Major issue. 

Rating D: 0
Assigned grade: A