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;
    for(int i=1;i<=n;i++){
        {
            if(i%2==0){
                if(n%2==0){
                repeat(i){
                    cout<<"x";
                }
                repeat((n-i)/2){
                    cout<<"ox";
                }
                
                }
                else{
                    repeat(i){
                        cout<<"x";
                    }
                    repeat((n-i-1)/2){
                        cout<<"ox";
                    }
                    cout<<"o";
                }
            }
            
            else{
                if(n%2==0){
                repeat(i){
                    cout<<"o";
                }
                repeat((n-i-1)/2){
                    cout<<"xo";
                }
                cout<<"x";
                }
                else{
                    repeat(i){
                        cout<<"o";
                    }
                    repeat((n-i)/2){
                        cout<<"xo";
                    }
                }
            }
            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=0; i<n; i++) {
		for(int j=0; j<n; j++) {
			if(i>=j) {
				if(i%2) {cout<<'x';}
				else {cout<<'o';}
			} else {
				if(j%2) {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=0;
        cin >> n;
        char x='x'; char o='o';
        for(int i=1; i<=n; i++) {
                if(i%2==0) {
                        for(int k=0; k<i; k++) {
                                cout << x;
                        }
                        for(int k=0; k<(n-i)/2; k++) {
                                cout << o;
                                cout << x;
                        }
                        if(n%2!=0) {
                                cout << o;
                        }
                }
                else {
                        for(int k=0; k<i; k++) {
                                cout << o;
                        }
                        for(int k=0; k<(n-i)/2; k++) {
                                cout << x;
                                cout << o;
                        }
                        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;i++){
                if(i%2==1){
                        repeat(i){
                                cout<<"o";}
                        int j=1;
                        repeat(n-i){
                                if(j%2==1){
                                        cout<<"x";}
                                else{
                                        cout<<"o";}
                                j++;
                        }
                }
                else{
                         repeat(i){
                                cout<<"x";}
                        int j=1;
                        repeat(n-i){
                                if(j%2==1){
                                        cout<<"o";}
                                else{
                                        cout<<"x";}
                                j++;
                        }
                }
                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,x,o,i=1,p=1;
cin >> n;
for(i<=n;){
    i%2=0;
        p=x;
        i++;
}
else{
    p=o;}

        repeat(n){
                repeat(n){
                        cout<<p;
                        p++;
                        int t=1;
                }

                        p=n+t;
                        p=x;
                        t++;
                }
}

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: D
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 c;
c=0;
for(int row=1;row<n+1;row++){
if(c%2==0){
repeat(row){
cout<<"o";
c=1;
}
}
else{
    repeat(row){
        cout<<"x";
        c=0;
    }
    }
for(int p=0;p<n-row;p++){
    if(c%2==0){
        cout<<"o";
        c=1;
    }
    else{
    cout<<"x";
    c=0;
    }
}
if (c==0){
    c=1;
}
else{
    c=0;
}
cout<<"\n";
}
}

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

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: 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;
             if(n%2==0){
                int i=1;
             repeat(n/2){
                         repeat((2*i)-2){cout<<"o";}repeat(((n+2)-(2*i))/2){cout<<"o"<<"x";}
                         cout<<endl;
                         repeat(2*i){cout<<"x";}repeat((n-(2*i))/2){cout<<"o"<<"x";}
                         cout<<endl;
                         i++;}
             }
             else{
                 int i=1;
                 repeat((n-1)/2){cout<<"o"<<"x";}
                 cout<<"o"<<endl;
                 repeat((n-1)/2){
                         repeat((2*i)-1){cout<<"x";}repeat(((n+1)-(2*i))/2){cout<<"x"<<"o";}
                        cout<<endl;
                        repeat((2*i)-1){cout<<"o";}repeat(((n+1)-(2*i))/2){cout<<"x"<<"o";}
                         cout<<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: 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 n=1; n<=N; n++){
                if(n%2==0){
                        repeat(n){
                                cout<<"x";
                        }
                        if((N-n)%2==0)
                        repeat((N-n)/2){
                                cout<<"o";
                                cout<<"x";
                        }
                        else{
                                repeat((N-n-1)/2){
                                        cout<<"o";
                                        cout<<"x";
                                }
                                cout<<"o";
                }
                }
                else{
                        repeat(n){
                                cout<<"o";
                        }
                        if((N-n)%2==0){
                                repeat((N-n)/2){
                                        cout<<"x";
                                        cout<<"o";
                                }
                        }
                        else{
                                repeat((N-n-1)/2){
                                        cout<<"x";
                                        cout<<"o";
                                }
                                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;i++){
              for (int j=1;j<=n;j++){
                      if (((i%2 == 1) && (j <=i)) || ((j%2==1)&& (i <=j))){
                              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>
main_program{
        int n,i=1;
        cin >> n;
        repeat(n){
                int j=0;
                if(i%2==0){
                        repeat(i){
                                cout << "x";
                                j++;
                        }
                        while(j<n){
                                cout << "o";
                                j++;
                                if(j<n){
                                        j++;
                                        cout << "x";
                                }
                        }
                        cout << endl;
                        i++;
                }
                else{
                        repeat(i){
                                cout << "o";
                                j++;
                        }
                        while(j<n){
                                cout << "x";
                                j++;
                                if(j<n){
                                        j++;
                                        cout << "o";
                                }
                        }
                        cout << 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