/*
* Tuenti Programming Challenge 2
* Challenge 4: 20 Fast 20 Furious
*
* Author: Pedro Antonio Pardal Jimena
* ppardalj@gmail.com
*/
import java.util.Scanner;
public class KartingCircuit {
private static long liters(long r, long k, long g, long[] gs) {
long liters = 0;
int gptr = 0;
int gend = 0;
// it is not specified what to do in this case...
if (gs[0] > k) {
return 0;
}
for (int j = 0; j < r; j++) {
int ng = 0;
do {
ng += gs[gptr];
gptr += 1;
if (gptr > g) {
gptr -= g;
}
} while ((ng + gs[gptr]) <= k && gptr != gend);
liters += ng;
gend = gptr;
}
return liters;
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
long cases = sc.nextLong();
for (int i = 0; i < cases; i++) {
sc.nextLine();
long r = sc.nextLong();
long k = sc.nextLong();
long g = sc.nextLong();
sc.nextLine();
long[] gs = new long[(int) g];
for (int j = 0; j < g; j++) {
gs[j] = sc.nextLong();
}
System.out.println(liters(r, k, g, gs));
}
}
}