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// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
"os"
)
func main() {
x := f(60)
fmt.Println(x)
if x != 54 {
os.Exit(11)
}
}
var escape *int
func f(i int) int {
a := 0
outer:
for {
switch {
case i > 55:
i--
continue
case i == 55:
for j := i; j != 1; j = j / 2 {
a++
if j == 4 {
escape = &j
i--
continue outer
}
if j&1 == 1 {
j = 2 * (3*j + 1)
}
}
return a
case i < 55:
return i
}
}
}
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