Sometimes, the problems don't have a main function to read file, as example:
funcmain(){reader:=bufio.NewReaderSize(os.Stdin, 16*1024*1024) nTemp, err:=strconv.ParseInt(strings.TrimSpace(readLine(reader)), 10, 64) checkError(err) n:=int(nTemp) varlines= []int{} for{input:=strings.TrimSpace(readLine(reader)) ifinput==""{break } lTemp, err:=strconv.ParseInt(input, 10, 64) checkError(err) lines=append(lines, int(lTemp)) } Execute(n, lines) } funcreadLine(reader*bufio.Reader) string{str, _, err:=reader.ReadLine() iferr==io.EOF{return"" } returnstrings.TrimRight(string(str), "\r\n") } funccheckError(errerror){iferr!=nil{panic(err) } }cat input01.txt | go run main.go cat input01.txt | npx ts-node src/foo.ts