What's wrong in this code i checked almost all inputs i can think of

#1

my code

#include
#include
using namespace std;
int main() {
int N,t,k=0,i=0,arr[20]={0},test[100000]={0};
cin>>N;
while(i<N)
{
cin>>t;
for(int j=0;j<t;j++)
{
cin>>arr[j];
}
int j=0,ms=0,cs=0;
while(arr[j]<0)
{
j++;
}
for(;j<t;j++)
{
cs=arr[j]+cs;
if(cs<0)
{
cs=0;
}
if(ms<cs)
{
ms=cs;
}
}
if(ms==0)
{
ms=INT_MIN;
for(int j=0;j<t;j++)
{
ms=max(ms,arr[j]);
}
}
test[k]=ms;
k++;
i++;
}
for(int i=0;i<N;i++)
{
cout<<test[i]<<endl;
}
return 0;
}

#2

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#3
#4
  1. size of array you takes is 20 only
  2. why you are using test array just print the ans without storing in array
#include<iostream>
#include<climits>
using namespace std;
int main() {
	int N,t,k=0,i=0,arr[100000];
	cin>>N;
	while(i<N)
	{
		cin>>t;
		for(int j=0;j<t;j++)
		{
			cin>>arr[j];
		}
		int j=0,ms=0,cs=0;
		while(arr[j]<0)
		{
			j++;
		}
		for(;j<t;j++)
		{
			cs=arr[j]+cs;
			if(cs<0)
			{
				cs=0;
			}
			if(ms<cs)
			{
				ms=cs;
			}
		}
		cout<<ms<<endl;
		i++;
	}
	return 0;
}
#5

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