#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<algorithm>

int main()
{
    long long int t,a,b;
    scanf("%lld",&t);
    while(t--)
    {
        scanf("%lld%lld",&a,&b);
        long long int ans=(a/2)+(b/2);
        printf("%lld\n",ans);
    }
    return 0;
}