For problem statement at 0-999/300-399/350-359/358/problemC.txt this is a correct solution, but verifier at 0-999/300-399/350-359/358/verifierC.go ends with All 100 tests passed can you fix the verifier? ```go
package main

import (
	"bufio"
	"os"
	"sort"
	"strconv"
)

var scanner *bufio.Scanner
var writer *bufio.Writer

func init() {
	scanner = bufio.NewScanner(os.Stdin)
	scanner.Split(bufio.ScanWords)
	writer = bufio.NewWriter(os.Stdout)
}

func scanInt() int {
	scanner.Scan()
	val, _ := strconv.Atoi(scanner.Text())
	return val
}

type Item struct {
	val     int
	origIdx int
}

func main() {
	defer writer.Flush()

	if !scanner.Scan() {
		return
	}
	n, _ := strconv.Atoi(scanner.Text())

	buffer := make([]Item, 0, n)
	idxBuffer := make([]int, 0, n)
	currentBlockSize := 0

	for k := 0; k < n; k++ {
		a := scanInt()
		if a > 0 {
			buffer = append(buffer, Item{val: a, origIdx: currentBlockSize})
			currentBlockSize++
		} else {
			if currentBlockSize == 0 {
				writer.WriteString("0\n")
			} else {
				// Prepare index buffer
				idxBuffer = idxBuffer[:currentBlockSize]
				for i := 0; i < currentBlockSize; i++ {
					idxBuffer[i] = i
				}

				// Sort indices by value descending
				sort.Slice(idxBuffer, func(i, j int) bool {
					return buffer[idxBuffer[i]].val > buffer[idxBuffer[j]].val
				})

				pick := 3
				if currentBlockSize < 3 {
					pick = currentBlockSize
				}

				// Get the top 'pick' indices and sort them by arrival time (original index)
				finalPicked := make([]int, pick)
				copy(finalPicked, idxBuffer[:pick])
				sort.Ints(finalPicked)

				p1, p2, p3 := -1, -1, -1
				if pick >= 1 {
					p1 = finalPicked[0]
				}
				if pick >= 2 {
					p2 = finalPicked[1]
				}
				if pick >= 3 {
					p3 = finalPicked[2]
				}

				for i := 0; i < currentBlockSize; i++ {
					if i == p1 {
						writer.WriteString("pushQueue\n")
					} else if i == p2 {
						if pick == 2 {
							writer.WriteString("pushStack\n")
						} else {
							writer.WriteString("pushFront\n")
						}
					} else if i == p3 {
						writer.WriteString("pushStack\n")
					} else {
						// Garbage placement logic
						pivot := -1
						if pick == 1 {
							pivot = p1
						} else {
							pivot = p2
						}

						if i < pivot {
							writer.WriteString("pushStack\n")
						} else {
							writer.WriteString("pushQueue\n")
						}
					}
				}

				if pick == 1 {
					writer.WriteString("1 popQueue\n")
				} else if pick == 2 {
					writer.WriteString("2 popQueue popStack\n")
				} else {
					writer.WriteString("3 popQueue popFront popStack\n")
				}
			}

			// Clear buffer for next block
			buffer = buffer[:0]
			currentBlockSize = 0
		}
	}

	// Handle trailing additions if any (though problem structure implies ending with extract usually, or just print pushes)
	for i := 0; i < currentBlockSize; i++ {
		writer.WriteString("pushStack\n")
	}
}
```