#pragma comment(linker, "/STACK:1024000000,1024000000")

#include<cstdio>

#include<cstring>

#include<cmath>

#include<algorithm>

#include<vector>

#include<map>

#include<set>

#include<queue>

#include<stack>

#include<iostream>

using namespace std;

typedef long long LL;

const double pi=acos(-1.0),eps=1e-;

void File()

{

    freopen("D:\\in.txt","r",stdin);

    freopen("D:\\out.txt","w",stdout);

}

inline int read()

{

    char c = getchar(); while(!isdigit(c)) c = getchar(); int x = ;

    while(isdigit(c)) { x = x *  + c - ''; c = getchar();  }

    return x;

}

const int maxn=;

int T,n;

double C,v0[maxn];

int main()

{

    scanf("%d",&T); while(T--)

    {

        scanf("%d%lf",&n,&C);

        for(int i=;i<=n;i++)

        {

            scanf("%lf",&v0[i]);

            int xi,di; scanf("%d%d",&xi,&di);

        }

        sort(v0+,v0+n+);

        int q; scanf("%d",&q);

        for(int i=;i<=q;i++)

        {

            int t,k; scanf("%d%d",&t,&k);

            printf("%.3lf\n",sqrt(2.0*C*t+v0[k]*v0[k]));

        }

    }

    return ;

}