#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
int  main()
{
    int t,a,b;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d%d",&a,&b);
        int wc,wcnm;
        wc=a/2;
        wcnm=b/2;
        printf("%d\n",wc+wcnm);
    }
    return 0;
}