美团前端笔试0311求解答

function  se(s){
    let i =1;
    let n  = s.length;
    let cnt  =0;
    while(i<n){
        if(s[i]==s[i-1]){
            cnt++;
            i+=2;
        }else{
            i++;
        }
    }
    return  cnt;
}
通过82%，为什么？？？？

var n;

var hang  =0;
function Point(l,r){
  this.l  =l;
  this.r  =r;
}
while(sc = read_line()){
  hang ++;
  if(hang==1){
     n  = parseInt(sc);
  }else if(hang==2){
    sl = sc.split(" ");
  }else{
    sr = sc.split(" ");
    let ar  =[];
    for(let i  =0;i<n;i++){
           let obj =  new Point(sl[i],sr[i]);
      ar.push(obj);
           
    }
    ar.sort((x,y)=>{
      if(x.l!=y.l){
        return x.l - y.l;
      }
      return x.r-y.r;
    });
    let map = new Map();
    for(let i  =0;i+1<n;i++){
      let obj1 = ar[i];
      let obj2 = ar[i+1];
      if(obj1.r>=obj2.l){
          let s1  = obj1.l+'#'+obj2.l;
          map.set(s1,map.get(s1)==undefined?1:1+map.get(s1));
          let s2  = obj2.l+'#'+obj1.r;
          map.set(s2,map.get(s2)==undefined?2:2+map.get(s2));
        let s3 = obj1.l+'#'+obj2.r;
          map.set(s3,map.get(s3)==undefined?1:1+map.get(s3));
      }
      else{
          let s4  = obj1.l+'#'+obj1.r;
          map.set(s4,map.get(s4)==undefined?1:1+map.get(s4));
        let s5  = obj2.l+'#'+obj2.r;
          map.set(s5,map.get(s5)==undefined?1:1+map.get(s5));
      }
      
    }   
    let maxx  =0;
    for(let key of map.keys()){
      if(maxx<map.get(key)){
        maxx=map.get(key);
      }   
}
    let sum  = 0;
     for(let key of map.keys()){
      if(map.get(key)==maxx){
        let sp = key.split('#');
        sum+=(parseInt(sp[1])-parseInt(sp[0]));
      }
  }
  let res =  maxx+" "+sum;
  print(res);
}
}


第二题超时？？？？