First 3 taste cases are not passing

#1

#include
using namespace std;
int main() {
int t;
cin>>t;
while(t–)
{
int n;
cin>>n;
int arr[n];
int inc[n];
int dec[n];
for(int i=0;i<n;i++)
{
cin>>arr[i];
}
inc[0]=1;
dec[n-1]=1;
for(int i=1;i<n;i++)
{
inc[i]=(arr[i]>=arr[i-1])?inc[i-1]+1:1;
}
for(int i=n-2;i>=0;i–)
{
dec[i]=(arr[i]>arr[i+1])?dec[i+1]+1:1;
}
int max1=inc[0]+dec[0]-1;
for(int i=1;i<n;i++)
{
max1=max(max1,inc[i]+dec[i]-1);
}
cout<<max1<<endl;
}
return 0;
}

#2

@shdanish1508 make this change in line 25
dec[i]=(arr[i]>=arr[i+1])?dec[i+1]+1:1;

#3

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