小题解

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