题解 | #记负均正#

let str;
while(str = parseInt(readline())){
  let lessZefo = 0,aver=0;
  let num = readline();
  let arr = num.split(' ')
  for(let v of arr){
    if(parseInt(v) < 0){
      lessZefo++
    }
  }
  let newArr = arr.filter((v)=>{
    return v>0;
  })
  let sum = newArr.reduce((pre,cur)=>{
    return pre+cur*1;
  },0)
  console.log(lessZefo,(sum/newArr.length).toFixed(1) )
}