Failed testcase

#1

now why is this not able to pass all the test cases?

#include
using namespace std;
int main()
{
int row, col;
cin>>row>>col;

int arr[row][col];

for (int i=0; i<row; i++)
{
	for (int j=0; j<col; j++)
	{
		cin>>arr[i][j];
	}
}

int key;
cin>>key;

int x=0;

for (int i=0; i<row; i++)
{
	
	for (int j=0; j<col; j++)
	{
		if (arr[i][j]==key)
		{
			x=1;
			cout<<1;
			break;
		}
	}
	
}
if (x=0)
{
	cout <<0;
}

return 0;

}

#2

hello @yamika

here it should be ==

#3

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