网络赛 1004

#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<=b;++i)
#define ms(arr,a) memset(arr,a,sizeof arr)
#define debug(x) cout<<"< "#x" = "<<x<<" >"<<endl

int main()
{
    //freopen("Input.txt","r",stdin);
    //freopen("Output.txt","w",stdout);
    int T;scanf("%d",&T);
    while(T--)
    {
        int a,b,c,n;
        scanf("%d%d",&n,&a);
        if(n>2||n==0){printf("-1 -1
");continue;}
        if(n==1){printf("%d %d
",1,a+1);continue;}
        int fac;
        bool flag=false;
        for(fac=1;fac<=int(sqrt(a));fac++)
        {
            int x=a/fac*a%2;
            if(a%fac==0)
                if(fac%2==x)
                    {
                        flag=true;
                        break;
                    }
        }
        if(flag==false)printf("-1 -1
");
        else printf("%d %d
",(a/fac*a-fac)/2,(fac+a/fac*a)/2);
    }
    //freopen("CON","w",stdout);
    //system("start Output.txt");
}