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array_manipulation.go
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array_manipulation.go
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package main
import (
"bufio"
"fmt"
"os"
)
func arrayManipulation(n int, queries [][]int) int64 {
arr := make([]int64, n)
for _, query := range queries {
a, b, k := query[0]-1, query[1], int64(query[2])
arr[a] += k
if b < n {
arr[b] -= k
}
}
for i := 1; i < len(arr); i++ {
arr[i] += arr[i-1]
}
var maximum = arr[0]
for _, value := range arr {
if maximum < value {
maximum = value
}
}
return maximum
}
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 n, m int
_, err = fmt.Fscan(reader, &n, &m)
checkError(err)
queries := make([][]int, m)
for i := 0; i < m; i++ {
queries[i] = make([]int, 3)
_, err = fmt.Fscan(reader, &queries[i][0], &queries[i][1], &queries[i][2])
checkError(err)
}
result := arrayManipulation(n, queries)
fmt.Fprint(writer, result)
writer.Flush()
}
func checkError(err error) {
if err != nil {
panic(err)
}
}