UVa 11044.cpp

/*BISMILLAHIR RAHMANIR RAHIM*/
#include<bits/stdc++.h>
#include<string>
#define lli long long int
#define case(ans) printf("Case %d: %d\n", k, ans)
#define yes cout << "YES" << endl
#define no cout << "NO" << endl
#define PI acos(-1.0)
#define loop(a, n, x) for(int i=a; i<=n; i+=x)
#define npoint(x) fixed << setprecision(x)
#define ALL(x) x.begin(), x.end()
#define rev(x) reverse(x.begin(), x.end())
#define pb(x) push_back(x)
#define ppb pop_back()
#define pf(x) push_front(x)
#define ppf pop_front()
#define mii map<int, int>
#define mci map<char, int>
#define mib map<int, bool>
#define dqi deque<int>
#define maxiii(a, b, c) max(max(a, b), c)
#define miniii(a, b, c) min(min(a, b), c)
#define vec vector<int>
#define pr pair<int, int>
/*-----------------ANUPAM AKIB-------------------*/

using namespace std;

int main(){
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);

    int n, m, t, sonar;
    cin >> t;
    while(t--){
        cin >> n >> m;
        if(n%3!=0){
            while(n%3!=0){
                n--;
            }
        }
        if(m%3!=0){
            while(m%3!=0){
                m--;
            }
        }
        cout << (m*n)/9 << endl;
    }
    return 0;
}