For problem statement at 0-999/800-899/850-859/850/problemB.txt this is a correct solution, but verifier at 0-999/800-899/850-859/850/verifierB.go ends with Test 4 failed
Input:
8 2 7
9 19 7 5 19 9 3 3
Expected:
12
Got:
8


exit status 1 can you fix the verifier? ```go
package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	// Configure fast I/O
	reader := bufio.NewReader(os.Stdin)
	writer := bufio.NewWriter(os.Stdout)
	defer writer.Flush()

	var n int
	var x, y int64

	// Read n, x, y
	fmt.Fscan(reader, &n, &x, &y)

	// Max value for elements as per constraints
	const MAX_V = 1000000

	// Frequency and prefix sum arrays
	// Size MAX_V + 2 is sufficient
	cnt := make([]int, MAX_V+2)
	sum := make([]int64, MAX_V+2)

	maxVal := 0
	for i := 0; i < n; i++ {
		var a int
		fmt.Fscan(reader, &a)
		cnt[a]++
		sum[a] += int64(a)
		if a > maxVal {
			maxVal = a
		}
	}

	// Compute prefix sums
	for i := 1; i <= MAX_V; i++ {
		cnt[i] += cnt[i-1]
		sum[i] += sum[i-1]
	}

	// Sieve of Eratosthenes to find primes up to MAX_V + 1
	// We might need to check primes slightly larger than maxVal, 
	// specifically up to maxVal + 1 because we can increase numbers.
	limit := MAX_V + 1
	isPrime := make([]bool, limit+1)
	for i := 2; i <= limit; i++ {
		isPrime[i] = true
	}
	for i := 2; i*i <= limit; i++ {
		if isPrime[i] {
			for j := i * i; j <= limit; j += i {
				isPrime[j] = false
			}
		}
	}

	// Initial answer is cost to delete all numbers
	ans := int64(n) * x

	// Iterate over all prime numbers g
	for g := 2; g <= limit; g++ {
		if !isPrime[g] {
			continue
		}

		var currentCost int64 = 0
		
		// Iterate through multiples of g
		// For each block ((j-1)*g, j*g], the target is j*g (denoted as k here)
		for k := g; k <= MAX_V+g; k += g {
			// Define the interval [l, r] covered by this multiple k
			l := k - g + 1
			if l > MAX_V {
				break
			}
			r := k
			if r > MAX_V {
				r = MAX_V
			}

			// We need to decide for each number in [l, r] whether to delete or upgrade.
			// Upgrade cost: (k - val) * y
			// Delete cost: x
			// We upgrade if (k - val) * y <= x  <==>  val >= k - x/y
			
			// Calculate the split point
			threshold := int64(k) - x/y
			
			// Determine the start of the upgrade range within [l, r]
			// The upgrade range is [max(l, threshold), r]
			// The delete range is [l, min(r, upgradeStart - 1)]
			
			upgradeStart := int64(l)
			if threshold > upgradeStart {
				upgradeStart = threshold
			}
			
			// Calculate deletion cost
			// Elements in range [l, deleteEnd]
			deleteEnd := int64(r)
			if upgradeStart - 1 < deleteEnd {
				deleteEnd = upgradeStart - 1
			}
			
			if int64(l) <= deleteEnd {
				count := int64(cnt[deleteEnd] - cnt[l-1])
				currentCost += count * x
			}
			
			// Calculate upgrade cost
			// Elements in range [upgradeStart, r]
			realUpStart := upgradeStart
			if realUpStart <= int64(r) {
				count := int64(cnt[r] - cnt[realUpStart-1])
				s := sum[r] - sum[realUpStart-1]
				// Cost is sum of (k - val)*y for val in range
				// = (count * k - sum(val)) * y
				currentCost += (count*int64(k) - s) * y
			}
		}

		if currentCost < ans {
			ans = currentCost
		}
	}

	fmt.Fprintln(writer, ans)
}
```