Code Chef Tax Slab Problem

#include<iostream>
using namespace std;

int main()
{
    int T;
    long long i, N, net, tax;
    
    cin >> T;
    
    for(i=1;i<=T;i++)
    {
        cin >> N;
        tax = 0;
        
        if(N<=250000)
        {
            tax = 0;
        }
        else if(N>250000 && N<=500000)
        {
            tax = 0.05*(N-250000);
        }
        else if(N>500000 && N<=750000)
        {
            tax = 0.05*250000 + 0.1*(N-500000);
        }
        else if(N>750000 && N<=1000000)
        {
            tax = 0.05*250000 + 0.1*250000 + 0.15*(N-750000);
        }
        else if(N>1000000 && N<=1250000)
        {
            tax = 0.05*250000 + 0.1*250000 + 0.15*250000 + 0.2*(N-1000000);
        }
        else if(N>1250000 && N<=1500000)
        {
            tax = 0.05*250000 + 0.1*250000 + 0.15*250000 + 0.2*250000 + 0.25*(N-1250000);
        }
        else
        {
            tax = 0.05*250000 + 0.1*250000 + 0.15*250000 + 0.2*250000 + 0.25*250000 + 0.3*(N-1500000);
        }
        
        net = N-tax;
        cout << net<<endl;
        
        
    }
}