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alternating_characters.go
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/
alternating_characters.go
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package main
import (
"bufio"
"fmt"
"os"
)
func alternatingCharacters(s string) int {
var result int
var i, j int
for i = 1; i < len(s); i++ {
if s[i] == s[j] {
result++
} else {
j = i
}
}
// var previousCharacter rune
// for _, ch := range s {
// if ch == previousCharacter {
// result++
// }
// previousCharacter = ch
// }
return result
}
func main() {
stdin, err := os.Open(os.Getenv("INPUT_PATH"))
if err != nil {
stdin = os.Stdin
}
defer stdin.Close()
stdout, err := os.Create(os.Getenv("OUTPUT_PATH"))
if err != nil {
stdout = os.Stdout
}
defer stdout.Close()
reader := bufio.NewReaderSize(stdin, 1024*1024)
writer := bufio.NewWriterSize(stdout, 1024*1024)
var q int
_, err = fmt.Fscan(reader, &q)
checkError(err)
var s string
for ; q > 0; q-- {
_, err = fmt.Fscan(reader, &s)
checkError(err)
result := alternatingCharacters(s)
fmt.Fprintln(writer, result)
}
writer.Flush()
}
func checkError(err error) {
if err != nil {
panic(err)
}
}