For problem statement at 0-999/200-299/240-249/245/problemF.txt this is a correct solution, but verifier at 0-999/200-299/240-249/245/verifierF.go ends with case 63 failed: expected 2012-01-01 00:00:14 got 2012-01-01 00:00:12
input:5 3
2012-01-01 00:00:04:A
2012-01-01 00:00:07:A
2012-01-01 00:00:10:A
2012-01-01 00:00:12:A
2012-01-01 00:00:14:A
2012-01-01 00:00:17:A
2012-01-01 00:00:21:A
2012-01-01 00:00:26:A
2012-01-01 00:00:28:A
2012-01-01 00:00:31:A
2012-01-01 00:00:34:A
2012-01-01 00:00:38:A
2012-01-01 00:00:43:A
2012-01-01 00:00:48:A
2012-01-01 00:00:51:A
2012-01-01 00:00:52:A
2012-01-01 00:00:53:A
2012-01-01 00:00:54:A
2012-01-01 00:00:55:A
2012-01-01 00:00:57:A
2012-01-01 00:01:00:A
2012-01-01 00:01:01:A
2012-01-01 00:01:03:A
2012-01-01 00:01:05:A
2012-01-01 00:01:10:A
2012-01-01 00:01:13:A
2012-01-01 00:01:17:A
2012-01-01 00:01:22:A
2012-01-01 00:01:25:A
2012-01-01 00:01:26:A
exit status 1 can you fix the verifier? package main

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

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Scan()
	line := scanner.Text()
	var n, m int
	fmt.Sscanf(line, "%d %d", &n, &m)
	var times []int64
	var timeStrs []string
	daysInMonth := []int{0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
	for scanner.Scan() {
		line = scanner.Text()
		month, _ := strconv.Atoi(line[5:7])
		day, _ := strconv.Atoi(line[8:10])
		hour, _ := strconv.Atoi(line[11:13])
		minute, _ := strconv.Atoi(line[14:16])
		sec, _ := strconv.Atoi(line[17:19])
		totalDays := 0
		for mo := 1; mo < month; mo++ {
			totalDays += daysInMonth[mo]
		}
		totalDays += day - 1
		totalSec := int64(totalDays)*86400 + int64(hour)*3600 + int64(minute)*60 + int64(sec)
		times = append(times, totalSec)
		timeStrs = append(timeStrs, line[0:19])
	}
	len_ := len(times)
	left := 0
	ans := -1
	for i := 0; i < len_; i++ {
		for left <= i && times[left] < times[i]-int64(n) {
			left++
		}
		count := i - left + 1
		if count >= m {
			ans = i
			break
		}
	}
	if ans == -1 {
		fmt.Println(-1)
	} else {
		fmt.Println(timeStrs[ans])
	}
}