再加一个参数又能怎

#include<bits/stdc++.h>
using namespace std;
const int MAXN=1e5+5;
int n,m,a[MAXN];
int f(int f,int k){
    int l=1,r=n,mid,res=-1;
    while(l<=r){
        mid=(l+r)/2;
        if(a[mid]==k){
            res=mid;
            if(f==-1){
                r=mid-1;
            }else l=mid+1;
        }else if(a[mid]<k){
            l=mid+1;
        }else r=mid-1;
    }
    return res;
}
int main() {
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    cin>>m;
    while(m--) {
        int b;
        cin>>b;
        cout<<f(-1, b)<<' '<<f(1,b)<<' ';
        if(upper_bound(a+1,a+n+1,b)-a>=n)cout<<-1;
        else cout<<upper_bound(a+1,a+n+1,b)-a;
        cout<<endl;
    }
    return 0;
}