View Code of Problem 17

#include<stdio.h>

int main(){
	int a[500][500],m,n,i,j,k,l,t=0,h=0;
	while (scanf("%d%d",&m,&n)!=EOF)
	{
		for (i=0;i<m;i++)
			for (j=0;j<n;j++)
              scanf("%d",&a[i][j]);
		for (i=0;i<m;i++)
			for (j=0;j<n;j++){
				k=i;
				l=j;
				flag=0;
				while (1){
				if (k==0&&l==0){
					if (a[k][l]-a[k+1][l]==-1){t++;k+=1;continue;}
					else if (a[k][l]-a[k][l+1]==-1){t++;l+=1;continue;}
				}
				else if (k==m-1&&l==n-1){
					if (a[k][l]-a[k-1][l]==-1){t++;k-=1;continue;}
					else if (a[k][l]-a[k][l-1]==-1){t++;l-=1;continue;}
				}
				else if (k==0&&j==n-1){
					if (a[k][l]-a[k+1][l]==-1){t++;k+=1;continue;}
					else if (a[k][l]-a[k][l-1]==-1){t++;l-=1;continue;}
				}
				else if (k==m-1&&l==0){
					if (a[k][l]-a[k-1][l]==-1){t++;k-=1;continue;}
					else if (a[k][l]-a[k][l+1]==-1){t++;l+=1;continue;}
				}
				else if (k==0){
					if (a[k][l]-a[k+1][l]==-1){t++;k+=1;continue;}
					else if (a[k][l]-a[k][l+1]==-1){t++;l+=1;continue;}
					else if (a[k][l]-a[k][l-1]==-1){t++;l-=1;continue;}
				}
				else if (k==m-1){
					if (a[k][l]-a[k-1][l]==-1){t++;k-=1;continue;}
					else if (a[k][l]-a[k][l+1]==-1){t++;l+=1;continue;}
					else if (a[k][l]-a[k][l-1]==-1){t++;l-=1;continue;}
				}
				else if (l==0){
					if (a[k][l]-a[k+1][l]==-1){t++;k+=1;continue;}
					else if (a[k][l]-a[k][l+1]==-1){t++;l+=1;continue;}
					else if (a[k][l]-a[k-1][l]==-1){t++;k-=1;continue;}
				}
				else if (l==n-1){
					if (a[k][l]-a[k+1][l]==-1){t++;k+=1;continue;}
					else if (a[k][l]-a[k-1][l]==-1){t++;k-=1;continue;}
					else if (a[k][l]-a[k][l-1]==-1){t++;l-=1;continue;}
				}
				else if (a[k][l]-a[k+1][l]==-1){t++;k+=1;continue;}
				else if (a[k][l]-a[k-1][l]==-1){t++;k-=1;continue;}
				else if (a[k][l]-a[k][l+1]==-1){t++;l+=1;continue;}
				else if (a[k][l]-a[k][l-1]==-1){t++;l-=1;continue;}
				break;
				}
				h=h>t?h:t;
				t=0;
					}
					printf("%d\n",h);
	}
	return 0;
}
/*
Main.c: In function 'main':
Main.c:14:5: error: 'flag' undeclared (first use in this function)
     flag=0;
     ^
Main.c:14:5: note: each undeclared identifier is reported only once for each function it appears in
*/

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