i am doing this codechef http://ift.tt/1a4H115 , i am getting run time error , it works fine on dev c++ compiler

actually , the problem is described below:

Chef's kid, Junior chef loves playing with different series. Chef, impressed by his son's curiosity, gifts him a special series S on his birthday S=1,2,-2,3,-3,3,4,-4,4,-4,............. Now chef, eager to check the intelligence of his son, gives him q queries to solve. Each query consists of two positions a and b, and Junior_chef is required to calculate the sum of all integers from a to b. Input

The first line of the input contains a single integer q, which denotes the number of queries. Next q lines consist of two integers, a and b. Output

Print the answer in single line. Constraints

1<=q<=10 , 1<=a,b<=10^12 Sample Input

1 1 4 Sample Output

4 Explanation : As the series is 1,2,-2,3, therefore the sum will be 4.

please do help

#include<iostream>
using namespace std;
main()
{
    int t;
    long int i,j,sum,number,temp,number2,tempi,count,a,b;
    cin>>t;
    while(t--)
    {
        count=0;
        number2=1;
        cin>>a>>b;
        i=b;
        long int str[b];
        j=0;
        tempi=i;
        while(i--)
        {
            temp=number2;
            number=number2;
            while(temp--)
            {
                str[j]=number;
                j++;
                count++;
                number=number*-1;
                if(count==tempi)
                break;
            }
            if(count==tempi)
            break;
            number2++;
        }
        sum=0;
        for(i=a-1;i<=b-1;i++)
        sum=sum+str[i];
        cout<<sum<<endl;
    }
}