Stock_buy_and_sell

#include<iostream>
using namespace std;
struct stock{
    int buy;
    int sell;
};
int main()
 {
//code
int t;
cin>>t;
while(t--)
{
   int n,i=0,c=0;
   cin>>n;
   int arr[n];
   stock s[n/2+1];
   while(i<n)
   {
       cin>>arr[i++];
   }
   i=0;
   while(i<n-1)
   {
       while(i<n-1&&arr[i]>=arr[i+1])
         i++;
       if(i==n-1)
       break;
       s[c].buy=i++;
       while(i<n&&arr[i-1]<=arr[i])
         i++;
       s[c].sell=i-1;
       c++;
   }
   for(i=0;i<c;i++)
   {
       cout<<"("<<s[i].buy<<" "<<s[i].sell<<") ";
   }
   if(c==0)
   cout<<"No Profit";
   cout<<endl;
}
return 0;
}