uri 1099

#include <stdio.h>
int main()
{
    int n,a,b,t,i,sum=0;
    scanf("%d",&n);
    for(i=1; i<=n; i++){
        scanf("%d %d",&a,&b);
        if(a<b){t=a;a=b;b=t;}
        for(i=b+1; i<a; i++){
            if(i%2!=0) sum+=i;
            if(a==b) sum+=0;
        }
        printf("%d\n",sum);
    }
    return 0;
}