Exam_Seat_arrangement

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
void main()
{
	int a[10][10]={{0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0},{0,0,0,0,0,0,0,0,0,0}};
	int m,n,r,i,j,k,sum=1,l;
	printf("Enter the dimension of the hall d1 and d2:");
	scanf("%d %d",&m,&n);
	l=m*n;
	if(l>100)
	{
		printf("This program can't access above 10*10 matrix");
		exit(0);
	}
	printf("Enter the number of students:");
	scanf("%d",&r);
	if(l%2==0)
	{
		if(r>(l/2))
		{
			printf("A maximum of %d students can sit in the hall\n\nSo this hall can't hold %d students ",l/2,r);
			exit(0);
		}
	}
	else
	{
		if(r>(l/2)+1)
		{
			printf("A maximum of %d students can sit in the hall\n\nSo this hall can't hold %d students",(l/2)+1,r);
			exit(0);
		}
	}
	for(i=0;i<m;i++)
	{
		for(j=0;j<n;j++)
		{
			if(i%2==0)
			{
				if(j%2==0)
				{
					a[i][j]=sum++;
					if(sum>r)
					{
						break;
				    }
				}
		    }
			else
			{
				if(j%2!=0)
				{
					a[i][j]=sum++;
					if(sum>r)
					{
						break;
					}
				}
			}
		}
		if(sum>r)
		{
			break;
		}
	}
	for(i=0;i<m;i++)
	{
		for(j=0;j<n;j++)
		{
			printf("%d\t",a[i][j]);
		}
		printf("\n");
	}
	getch();
}