题解 | 谁是你的潜在朋友

#include<iostream>
#include<cstring>
using namespace std;
int main(){
    int n,m;
    cin>>n>>m;
    int reader[n],book[m+1];
    memset(book,0,sizeof(book));
    for(int i=0;i<n;i++){
        cin>>reader[i];
        book[reader[i]]++;
    }
    for(int i=0;i<n;i++){
        if(book[reader[i]] > 1){
            cout<<(book[reader[i]]-1)<<endl;
        }
        else{
            cout<<"BeiJu"<<endl;
        }
    }
    return 0;
}