/*

 Every tenant went up N floors would make the dissatisfied degree rise N * a + 0.5 * N * (N - 1) degrees,

 every tenant went down N floors would make the dissatisfied degree rise N * b + 0.5 * N * (N - 1) degrees. 

   △= Dp+1 – Dp

 = ∑1=<i<=p Ki*(b+p-i)) - ∑p<i<=n Ki*(a+i-p-1)

 =  ∑1=<i<=n Ki * i +(b+p)*∑1=<i<=p Ki   -     (a-p-1)∑p<i<=n Ki

 */

 #include <iostream>

 #define MAXN  10001

 using namespace std;

 __int64 _m[MAXN+];

 int k[MAXN+];

 __int64 p_2[MAXN+];

 __int64 p_3[MAXN+];

 int k_1[MAXN];

 int k_2[MAXN];

 int main()

 {

     //freopen("acm.acm","r",stdin);

     int test;

     int n;

     int i;

     int j;

     int  p_1;

     int a;

     int b;

     scanf("%d",&test);

     while(test --)

     {

         scanf("%d",&n);

         scanf("%d",&a);

         scanf("%d",&b);

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

         {

             scanf("%d",&k[i]);

         }

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

         {

             k_1[i] = k_2[i] = k[i];

         }

         for(i = n-; i >=; -- i)

         {

             k_2[i] += k_2[i+];

         }

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

         {

             k_1[i] += k_1[i-];

         }

         p_1 = ;

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

         {

             p_1 += k[i]*i;

         }

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

         {

             p_2[i] = (b + i)*k_1[i];

         }

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

         {

             k_2[i] -= k[i];

         }

         copy(k_2,k_2+n+,p_3);

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

         {

             p_3[i] *= (a-i-);

         }

         _m[] = ;

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

         {

             _m[] += (i-)*a+((i-)*(i-)/);

         }

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

         {

             _m[i] = _m[i-] - p_1 + p_2[i-] - p_3[i-];

         }

         __int64 min = ;

         int place;

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

         {

             if(_m[i] < min)

             {

                 min = _m[i];

                 place = i;

             }

         }

         cout<<place<<endl;

     }

 }