POJ 1663

 1 #include<iostream>//cheng da cai zi 
 2 using namespace std;
 3 int main()
 4 {
 5     int time;
 6     cin>>time;
 7     while(time--){
 8     int x;
 9     int y;
10     int num;
11     cin>>x;
12     cin>>y;
13     num=(x/2)*2+x;
14     if(x==y)
15         cout<<num<<endl;
16     else if(x==(y+2))
17         cout<<num-2<<endl;
18     else
19         cout<<"No Number"<<endl;
20     }
21     return 0;
22 }