/
main.go
77 lines (60 loc) · 1.26 KB
/
main.go
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package main
import (
"bufio"
"fmt"
"io"
"os"
"strconv"
"strings"
)
// Complete the repeatedString function below.
func repeatedString(s string, n int64) int64 {
min := 1
maxS := 100
maxN := int64(1000000000000)
sTotal := len(s)
if sTotal < min || sTotal > maxS || n < 1 || n > maxN {
return 0
}
asCount := countA(sTotal, s)
if asCount == 0 {
return 0
}
if asCount == sTotal {
return n
}
rst := (n / int64(sTotal)) * int64(asCount)
modT := n % int64(sTotal)
if modT > 0 {
rst += int64(countA(int(modT), s[:modT]))
}
return rst
}
func countA(sTotal int, s string) int {
return sTotal - len(strings.Replace(s, "a", "", -1))
}
func main() {
reader := bufio.NewReaderSize(os.Stdin, 1024*1024)
stdout, err := os.Create(os.Getenv("OUTPUT_PATH"))
checkError(err)
defer stdout.Close()
writer := bufio.NewWriterSize(stdout, 1024*1024)
s := readLine(reader)
n, err := strconv.ParseInt(readLine(reader), 10, 64)
checkError(err)
result := repeatedString(s, n)
fmt.Fprintf(writer, "%d\n", result)
writer.Flush()
}
func readLine(reader *bufio.Reader) string {
str, _, err := reader.ReadLine()
if err == io.EOF {
return ""
}
return strings.TrimRight(string(str), "\r\n")
}
func checkError(err error) {
if err != nil {
panic(err)
}
}