Chef in Vaccination Queue.txt

#include <bits/stdc++.h>
#define ll long long int
#define loop(n) for(int i=0;i<n;i++)
#define br() cout<<"\n"
#define print(n) cout<<n<<"\n";
#define matarani_s_blessing ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;

void jaiShreeRam(){

    ll n,p,x,y; cin>>n>>p>>x>>y;
    p-=1;
    ll ip;

    ll sum = 0;
    for(int i=0;i<n;i++)
    {
        cin>>ip;
        if(i<=p)
        if(ip == 1) sum+=y;
        else sum+=x;
    }

    cout<<sum<<"\n";

}

int main() {

    //matarani_s_blessing;

	ll t; cin>>t;
	while(t--)
	{
	    jaiShreeRam();
	}
	return 0;
}