Matrix search let me know the mistake

#1

#include
using namespace std;

int staircasesearch(int arr[][1000],int m,int n,int key)
{
int i=0, j=n-1;

while(i<m && j>=0)
{
	if(arr[i][j]==key)
	{
		return 1;
	}

	else
	return 0;

}
cout<<0;

}

int main() {

int m,n;
cin>>m>>n;

int arr[m][1000];

for(int i=0;i<m;i++)
{
	for(int j=0;j<n;j++)
	{
		cin>>arr[i][j];
	}
}
int key;
cin>>key;

cout<<staircasesearch(arr,m,n,key);

return 0;

}

#2

You are just checking the last element of first row, you are not updating i and j.

#3

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