bdfz_2024_summer/day12/U466180/U466180.cpp

//暴力30Points

#include<bits/stdc++.h>
using namespace std;
#define int long long

const int MAX_N = 1000+5;
int a[MAX_N];
int n,amax=INT_MIN,ans=0;
unordered_map<int,long long> um;
int readint();

signed main(signed argc,char *argv[]){
    #ifdef OITEST
        #define AS_EQ(a,b){if((a)!=(b)){cerr<<"assert eq faild:"<<endl<<#a<<":"<<(a)<<endl<<#b<<":"<<(b)<<endl;exit(-1);}}
        #define AS_NE(a,b){if((a)==(b)){cerr<<"assert not eq faild:"<<endl<<#a<<":"<<(a)<<endl<<#b<<":"<<(b)<<endl;exit(-1);}}
        AS_EQ(argc,3)
        auto fin = freopen(argv[1],"r",stdin);
        AS_NE(fin,NULL)
        ifstream afile(argv[2]);
        AS_EQ(afile.is_open(),true);

    #endif
    n=readint();
    for(int i=1;i<=n;i++){
        a[i]=readint();
    }
    for(int i=1;i<=n;i++){
        int num=a[i];
        for(int j=2;j<=sqrt(a[i]);j++){
            if(num%j==0){
                um[j]+=a[i];
                while(num%j==0)num/=j;
            }
        }
        if(num>1){
            um[num]+=a[i];
        }
    }
    for(auto i : um){
        ans+=i.second;
    }
    cout<<ans<<endl;
    #ifdef OITEST
        int cans;
        afile>>cans;
        AS_EQ(ans,cans)
    #endif
}   

int readint(){
    int x=0,w=1;
    char ch=0;
    while(!isdigit(ch)){
        if(ch=='-')w=-1;
        ch=getchar();
    }
    while(isdigit(ch)){
        x=x*10+(ch-'0');
        ch=getchar();
    }
    return x*w;
}