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 ;
int a=1,b=1;
while (b<n+1){
if (b%2==1)
{repeat(b){cout << "o";
          a++;}
        while(a<n+1){
        if(a%2==1)
                cout<<"o";
        else
                cout<<"x";
        a++;
        }cout << endl;
b++;
a=1;
}
else
{repeat(b){cout << "x";
          a++;
          }
while(a<n+1){
        if(a%2==1)
                cout<<"o";
        else
                cout<<"x";
        a++;
        }cout << endl;
b++;
a=1;
}

}



}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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 k=1;

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

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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++){
                if(i%2==0)
                        repeat(i){
                                cout<<"x";
                        }
                else{
                        repeat(i){
                                cout<<"o";
                        }
                }
                for(int j=i+1; j<=n; j++){
                        if(j%2==0)
                                cout<<"x";
                        else
                                cout<<"o";
                }
                cout<<endl;
        }
}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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>

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

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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>
// this is to check if the character at (x,y) in a grid would be o or x
char ox(int a, int b) {
    // notice that we can look at the L's just by seeing maximum of a and b in (a,b)
    // the below if statement is for figuring out the maximum
    if (a<b) {a = b;}
    // notice that since it alternates, we only care whether the L is even or odd
    //the below is for checking that
    if (a%2 == 0) {return 'o';}
    else {return 'x';}
}
main_program{
    // x is the up/down pos
    int x = 0;
    // y is the left/right pos
    int y = 0;
    // n is the size of the grid
    int n;
    //taking the size of grid as input
    cin >> n;
    //looping over all x values
    while (x < n) {
        //whenever we go to new line, the y value resets to 0
        y = 0;
        //looping over all y values
        while (y < n){
            //outputing o or x depending on (x,y) using our previously defined function
            cout << ox(x,y);
            //making sure to go the next y value
            y = y + 1;
        }
        //at the end of the line we have to go to the next line
        cout << endl;
        //making sure to go to the next x value
        x = x + 1;
    }
}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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++){
		if(n%2==0){
			if(i%2!=0){
				repeat(i){
					cout<<"o";}
				repeat((n-i-1)/2){
					cout<<"x"<<"o";}
				cout<<"x"<<endl;
			}
			if(i%2==0){
				repeat(i){
					cout<<"x";}
				repeat((n-i)/2){
					cout<<"o"<<"x";}
				cout<<endl;
			}
		}
		if(n%2!=0){
			if(i%2!=0){
				repeat(i){
					cout<<"o";}
				repeat((n-i)/2){
					cout<<"x"<<"o";}
				cout<<endl;}
			if(i%2==0){
				repeat(i){
					cout<<"x";}
				repeat((n-i-1)/2){
					cout<<"o"<<"x";}
				cout<<"o"<<endl;
			}
		}
	}
}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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 a=1;a<=n;a++){
                if(a%2==1){
                        for(int b=1;b<=a;b++){
                                cout << 'o';
                        }
                        for(int b=a+1;b<=n;b++){
                                if(b%2==0){
                                        cout <<'x';
                                }
                                else{
                                        cout <<'o';}}}
                else{
                        for(int b=1;b<=a;b++){
                                cout << 'x';
                        }
                        for(int b=a+1;b<=n;b++){
                                if(b%2==0){
                                        cout <<'x';
                                }
                                else{
                                        cout <<'o';}}}
                cout<<endl;
        }}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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, i, j, k=1;
	cin>>n;
	for(i=1; i<=n; i++)
	{
		for(j=0; j<i; j++)
		{
			if(k>0)
			{
				cout<<"o";
			}
			else
			{
				cout<<"x";
			}
		}
		k=-k;
		for(j=0; j<n-i; j++)
		{
			if(k>0)
			{
				cout<<"o";
				k=-k;
			}
			else
			{
				cout<<"x";
				k=-k;
			}
		}
		cout<<endl;
		if(i%2==1)
			k=-1;
		else
			k=1;
	}
}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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++){
        if(i%2==0){repeat(i){cout<<"x";}
        repeat((n-i)/2){cout<<"ox";}
        if(n%2==1)cout<<"o";
        cout<<endl;}
        else {repeat(i){cout<<"o";}
        repeat((n-i)/2){cout<<"xo";}
        if(n%2==0)cout<<"x";
        cout<<endl;}
       
    }
}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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+1 ;i++){
                for (int j = 1 ; j < n+1 ; j++){
                        if(j<i+1){
                                if(i%2 == 0) cout << "x";
                                else cout << "o";
                        }       
                        else {
                                if (j%2 == 0) cout << "x";
                                else cout << "o";
                        }               
                }       
                cout << endl;
        }       
}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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 (i%2!=0){
				if (j%2==0 && j>i) cout<<"x";
				else cout<<"o";
			}
			else{
				if ((j<=i)||(j%2==0)) cout<<"x";
				else cout<<"o";
			}
		}
		cout<<endl;
	}
}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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,p,i=1;
cin>>n;
if(n%2 == 0){
        while(i<=n){
        p=i;
if(i%2 == 0){
        repeat(p){
        cout<<"x";
        }
        repeat((n-p)/2){
        cout<<"o"<<"x";
        }
cout<<endl;
}
else{
repeat(p-1){
cout<<"o";
}
repeat((n-p+1)/2){
cout<<"o"<<"x";
}
cout<<endl;
}
i++;
}
}
else{
        while(i<=n){
        p=i;
if(i%2 == 0){
        repeat(p){
        cout<<"x";
        }
        repeat((n-p)/2){
        cout<<"o"<<"x";
        }
cout<<"o"<<endl;
}
else{
repeat(p-1){
cout<<"o";
}
repeat((n-p+1)/2){
cout<<"o"<<"x";
}
cout<<"o"<<endl;
}
i++;
}
}
}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

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+1);i++){
                if(i%2==1){
                for(int j=0;j<i;j++){cout<<"o";}
                for(int k=0;k<((n-i)/2);k++){cout<<"xo";}
                if(n%2==0) cout<<"x";
                }
                else {
                for(int j=0;j<i;j++){cout<<"x";}
                for(int k=0;k<((n-i)/2);k++){cout<<"ox";}
                if (n%2!=0) cout<<"o";
                }
                cout<<endl;
        }
}

Grading criterion: Printing the 'o' or 'x' in the pattern
Rating A: Correctly determines whether to print 'o' or 'x' and prints it

Rating B: Some minor issues like computing whether the row is even or odd, determining the next character, etc

Rating C: Some issue. 

Rating D: Major issue. 

Assigned grade: A