URI Problem (Sum of Consecutive Odd Numbers III) 1158:
Sum of Consecutive Odd Numbers III is a basic problem on URI online judge for novice problem solver.
You can find details on this Link.

import java.util.Scanner;

/**
 * @Author : Muhammad Harun-Or-Roshid
 * @Date   : Oct 21, 2016
 * @Time   : 11:12:29 PM
 */
public class Uri1158 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for (int i = 0; i < n; i++) {
            int x = sc.nextInt();
            int y = sc.nextInt();
            int count = 0,total = 0;
            while(y>count){
                if(x%2!=0){
                    total+=x;
                    count++;
                }
                x++;
            }
            System.out.println(total);
        }
    }
}