Why my code not work in sample test case other cases passed successfully

#1

#include<bits/stdc++.h>
using namespace std;

int main()
{
int n,m;
cin>>n>>m;
int a[n][m];

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

int k;
cin>>k;

int x=a[0][0],y=a[n-1][m-1],i=0,j=m-1;
if(k<x||k>y)
    {
        cout<<"0"<<endl;
    }
while(i<n&&j>=0)
{
    if(a[i][j]==k)
    {
        cout<<"1";
        return 0;
    }
    if(a[i][j]>k)
    {
        j--;
    }
    if(a[i][j]<k)
    {
        i++;
    }
}
return 0;

}

#2

hello @Gajesh-Namdeo-1171329206542221
what output u r getting for sample test case?

#3

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