题解

#include<bits/stdc++.h>
using namespace std;
    
int main()
{
    int a[1];
    cin>>a[0];
    if(a[0]<7){
        cout<<"Acidic"<<endl;
    }else if(a[0]>7){
        cout<<"alkalinity";
    }else{
        cout<<"neutral";
    }
    return 0;
}