For problem statement at 0-999/200-299/270-279/279/problemB.txt this is a correct solution, but verifier at 0-999/200-299/270-279/279/verifierB.go ends with All tests passed can you fix the verifier? package main

import (
	"bufio"
	"fmt"
	"os"
)

type FastReader struct {
	r *bufio.Reader
}

func NewFastReader() *FastReader {
	return &FastReader{r: bufio.NewReaderSize(os.Stdin, 1<<20)}
}

func (fr *FastReader) nextInt64() int64 {
	var sign int64 = 1
	var val int64 = 0
	c, err := fr.r.ReadByte()
	for err == nil && (c <= ' ' || c > '~') {
		c, err = fr.r.ReadByte()
	}
	if err != nil {
		return 0
	}
	if c == '-' {
		sign = -1
		c, err = fr.r.ReadByte()
	}
	for err == nil && c >= '0' && c <= '9' {
		val = val*10 + int64(c-'0')
		c, err = fr.r.ReadByte()
	}
	return val * sign
}

func main() {
	in := NewFastReader()
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	n := int(in.nextInt64())
	t := in.nextInt64()
	a := make([]int64, n)
	for i := 0; i < n; i++ {
		a[i] = in.nextInt64()
	}

	var sum int64
	best := 0
	l := 0
	for r := 0; r < n; r++ {
		sum += a[r]
		for sum > t && l <= r {
			sum -= a[l]
			l++
		}
		if cur := r - l + 1; cur > best {
			best = cur
		}
	}

	fmt.Fprintln(out, best)
}