/
main.go
108 lines (89 loc) · 1.87 KB
/
main.go
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package main
import (
"bufio"
"fmt"
"io"
"os"
"strconv"
"strings"
)
// Complete the hourglassSum function below.
func hourglassSum(arr [][]int32) int32 {
hTotal := len(arr)
if hTotal < 3 || hTotal > 6 {
return 0
}
rst := int32(-100)
for i := 1; i < hTotal-1; i++ {
sum, ch := countSum(arr[i-1], arr[i], arr[i+1])
if !ch {
return 0
}
if sum > rst {
rst = sum
}
}
return rst
}
func countSum(aRr, bRr, cRr []int32) (int32, bool) {
rst := int32(-100)
for i := 1; i < len(aRr)-1; i++ {
a1 := aRr[i-1]
a2 := aRr[i]
a3 := aRr[i+1]
b2 := bRr[i]
c1 := cRr[i-1]
c2 := cRr[i]
c3 := cRr[i+1]
if !validValue(a1) || !validValue(a2) || !validValue(a3) || !validValue(b2) || !validValue(c1) || !validValue(c2) || !validValue(c3) {
return 0, false
}
sum := a1 + a2 + a3 + b2 + c1 + c2 + c3
if sum > rst {
rst = sum
}
}
return rst, true
}
func validValue(n int32) bool {
min := -9
max := 9
return int(n) >= min && int(n) <= max
}
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)
var arr [][]int32
for i := 0; i < 6; i++ {
arrRowTemp := strings.Split(readLine(reader), " ")
var arrRow []int32
for _, arrRowItem := range arrRowTemp {
arrItemTemp, err := strconv.ParseInt(arrRowItem, 10, 64)
checkError(err)
arrItem := int32(arrItemTemp)
arrRow = append(arrRow, arrItem)
}
if len(arrRow) != int(6) {
panic("Bad input")
}
arr = append(arr, arrRow)
}
result := hourglassSum(arr)
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)
}
}