#include<map>
#include<queue>
#include<cmath>
#include<iostream>
#include<cstdio>
#include<stack>
#include<cstring>
#include<algorithm>
#define LL long long
#define inf 0x3f3f3f3f
const double PI=acos(-1.0);
using namespace std;
int main(){
    int n,m,i,j,k,a,b;
    while(~scanf("%d",&n)){
        while(n--){
            scanf("%d%d",&a,&b);
            printf("%d\n",a/2+b/2);
        }
    }
    return 0;
}