UVA 10783 - Odd Sum

#include
int main()
{
    int a,b,c,s,i,j;
    while (scanf("%d",&c)==1)
    {
        for(i=1;i<=c;i++)
        {
            scanf("%d %d",&a,&b);

            s=0;
            if(a%2==0)
            a=a+1;

            for(j=a;j<=b;j=j+2)
                s+=j;

            printf("Case %d: %d\n",i,s);
        }
    }
    return 0;
}