1562 Guess the number

 1 #include <iostream>
 2 #include <stdio.h>
 3 #include <string.h>
 4 using namespace std;
 5 
 6 int main()
 7 {
 8      int a,b,c,n,k,j;
 9      while(cin>>n)
10      {
11          for(int i=1;i<=n;i++)
12          {
13              cin>>a>>b>>c;
14              k=0;
15              for(j=(1000/a)*a;j<10000;j=j+a)
16              {
17                  if((j+1)%b==0&&(j+2)%c==0)
18                  {
19                      k=1;
20                      break;
21                  }
22              }
23              if(k==1)
24              cout<<j<<endl;
25              else
26              cout<<"Impossible"<<endl;
27          }
28      }
29      return 0;
30 
31 }