problems solving about time limit exceeded

how can i solve the time limit exceeded in my code like this : C. Sum of Range time limit per test 0.5 seconds memory limit per test 256 megabytes input standard input output standard output

Given 2 numbers A and B. Print three lines that contain the following respectively:

summation of all numbers between A and B (inclusive).
summation of even numbers between A and B (inclusive).
summation of odd numbers between A and B (inclusive). 

Input

Only one line contains two numbers A and B (1 ≤ A, B ≤ 109). Output

Print the answer required above.

Input

4 6 output 15 10 5

this my code

#include <iostream>
using namespace std;
void range(long long a , long long b)
{
    cin>>a>>b;
    long long sum=0,s=0,ss=0;
    for(int i=min(a,b);i<=max(a,b);i++)
    {
        sum=sum+i;
    }
    cout<<sum<<endl;
  for(int i=min(a,b);i<=max(a,b);i++)
    {
        if(i%2==0)
        {
            s=s+i;
        }
    }
    cout<<s<<endl;
    for(int i=min(a,b);i<=max(a,b);i++)
    {
        if(i%2!=0)
        {
            ss=ss+i;
        }
    }
    cout<<ss<<endl;
}
 
int main()
{
long long a,b;
 
 
range(a,b);
 
}