深信服笔试

1. 第一题，这个感觉是在考察你的api能力和细节

   const sss = readline()
   let str = '', ans = '', f = true
   for (let i = 0; i < sss.length; i++) {
   if (f) {
    if (sss[i] === ' ') {
      f = false
      continue
    }
    str += sss[i]
   } else {
    ans += sss[i]
   }
   }
   str = JSON.stringify(new Date(+str))
   const arr = str.split('T')
   let left = arr[0].split('-')
   let year = left[0].slice(1), mon = left[1], day = left[2]
   let right = arr[1].split('.')[0].split(':')
   let hour = right[0], min = right[1], second = right[2]
   if (mon.startsWith('0')) mon = mon.slice(1)
   if (day.startsWith('0')) day = day.slice(1)
   if (year.startsWith('0')) year = year.slice(1)
   if (hour.startsWith('0')) hour = hour.slice(1)
   if (min.startsWith('0')) min = min.slice(1)
   if (second.startsWith('0')) second = second.slice(1)
   const keyarr = ['yyyy', 'MM', 'dd', 'HH', 'mm', 'ss']
   const valuearr = [year, mon, day, hour, min, second]
   for (let i = 0; i < keyarr.length; i++) {
   while (ans.indexOf(keyarr[i]) !== -1) {
    ans = ans.replace(keyarr[i], valuearr[i])
   }
   }
   print(ans)

2.不知道为什么，80%

const arr = readline().split(' ').map(x => +x)
let n = arr[0]//客人数量
let t = arr[1]//时间

const all = Array(n).fill(0).map((item, index) => index)

let start = 0
while (all.length > 1) {
    start = (start + t) % (all.length)
    all.splice(start, 1)
}
print(all[0])

3.滑动窗口就行

const arr = readline().split(' ').map(x => +x)
const k = arr.splice(arr.length - 1, 1)

if (arr.reduce((a, b) => a + b, 0) < k) print(0)

//滑动窗口
let left = 0, right = 0, min = Infinity, sum = 0
let ans = []
while (right < arr.length) {
    sum += arr[right]
    while (sum >= k) {
        if ((right - left + 1) < min) {
            min = right - left + 1
            ans = []
            for (let i = left; i <= right; i++) {
                ans.push(i)
            }
            ans = ans.join(' ')
        }
        sum -= arr[left]
        left++
    }
    right++
}
print(ans)