85 lines
1.7 KiB
Go
85 lines
1.7 KiB
Go
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package main
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"strconv"
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"strings"
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)
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/*
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* Complete the 'diagonalDifference' function below.
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*
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* The function is expected to return an INTEGER.
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* The function accepts 2D_INTEGER_ARRAY arr as parameter.
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*/
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func diagonalDifference(arr [][]int32) int32 {
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var sum int32
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for i, row := range arr {
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sum += row[i] - row[len(row)-i-1]
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}
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if sum < 0 {
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sum *= -1
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}
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return sum
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}
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func main() {
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reader := bufio.NewReaderSize(os.Stdin, 16 * 1024 * 1024)
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stdout, err := os.Create(os.Getenv("OUTPUT_PATH"))
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checkError(err)
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defer stdout.Close()
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writer := bufio.NewWriterSize(stdout, 16 * 1024 * 1024)
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nTemp, err := strconv.ParseInt(strings.TrimSpace(readLine(reader)), 10, 64)
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checkError(err)
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n := int32(nTemp)
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var arr [][]int32
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for i := 0; i < int(n); i++ {
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arrRowTemp := strings.Split(strings.TrimRight(readLine(reader)," \t\r\n"), " ")
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var arrRow []int32
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for _, arrRowItem := range arrRowTemp {
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arrItemTemp, err := strconv.ParseInt(arrRowItem, 10, 64)
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checkError(err)
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arrItem := int32(arrItemTemp)
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arrRow = append(arrRow, arrItem)
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}
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if len(arrRow) != int(n) {
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panic("Bad input")
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}
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arr = append(arr, arrRow)
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}
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result := diagonalDifference(arr)
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fmt.Fprintf(writer, "%d\n", result)
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writer.Flush()
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}
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func readLine(reader *bufio.Reader) string {
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str, _, err := reader.ReadLine()
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if err == io.EOF {
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return ""
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}
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return strings.TrimRight(string(str), "\r\n")
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}
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func checkError(err error) {
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if err != nil {
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panic(err)
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}
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}
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