网络赛 1004

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 #define rep(i,a,b) for(int i=a;i<=b;++i)
 4 #define ms(arr,a) memset(arr,a,sizeof arr)
 5 #define debug(x) cout<<"< "#x" = "<<x<<" >"<<endl
 6 
 7 int main()
 8 {
 9     //freopen("Input.txt","r",stdin);
10     //freopen("Output.txt","w",stdout);
11     int T;scanf("%d",&T);
12     while(T--)
13     {
14         int a,b,c,n;
15         scanf("%d%d",&n,&a);
16         if(n>2||n==0){printf("-1 -1
");continue;}
17         if(n==1){printf("%d %d
",1,a+1);continue;}
18         int fac;
19         bool flag=false;
20         for(fac=1;fac<=int(sqrt(a));fac++)
21         {
22             int x=a/fac*a%2;
23             if(a%fac==0)
24                 if(fac%2==x)
25                     {
26                         flag=true;
27                         break;
28                     }
29         }
30         if(flag==false)printf("-1 -1
");
31         else printf("%d %d
",(a/fac*a-fac)/2,(fac+a/fac*a)/2);
32     }
33     //freopen("CON","w",stdout);
34     //system("start Output.txt");
35 }