#include <cstdio>
#include <iostream>
#include <cstring>
#include <string>
#include <cmath>
#include <cctype>
#include <cstdlib>
#include <algorithm>
using namespace std;
#define maxn 1000086
int cmp(int a,int b)
{
    return a>b;
}
int main()
{
    int t;
    scanf("%d",&t);
    while(t--)
    {
        long long n,m;
        scanf("%lld%lld",&n,&m);
        long long sum;
        sum=n/2+m/2;
        printf("%lld\n",sum);
    }
    return 0;
}