CF12C Fruits（贪心）

题意是给你一些价格标签和一堆水果，水果的数量可能不为1，你要给每种水果任意地贴上价格标签使得总价格最大/最小

贪心搞一下就完事了，先用map把每种水果的数量搞出来，因为输入的时候是按照水果名字输入的

然后把价格的升降序和水果数量的升降序分别比较一下，一共四种情况

代码：

#include <bits/stdc++.h>
#define int long long
#define sc(a) scanf("%lld",&a)
#define scc(a,b) scanf("%lld %lld",&a,&b)
#define sccc(a,b,c) scanf("%lld %lld %lld",&a,&b,&c)
#define schar(a) scanf("%c",&a)
#define pr(a) printf("%lld",a)
#define fo(i,a,b) for(int i=a;i<b;++i)
#define re(i,a,b) for(int i=a;i<=b;++i)
#define rfo(i,a,b) for(int i=a;i>b;--i)
#define rre(i,a,b) for(int i=a;i>=b;--i)
#define prn() printf("\n")
#define prs() printf(" ")
#define mkp make_pair
#define pii pair<int,int>
#define pub(a) push_back(a)
#define pob() pop_back()
#define puf(a) push_front(a)
#define pof() pop_front()
#define fst first
#define snd second
#define frt front()
#define bak back()
#define mem0(a) memset(a,0,sizeof(a))
#define memmx(a) memset(a,0x3f3f,sizeof(a))
#define memmn(a) memset(a,-0x3f3f,sizeof(a))
#define debug
#define db double
#define yyes cout<<"YES"<<endl;
#define nno cout<<"NO"<<endl;
using namespace std;
typedef vector<int> vei;
typedef vector<pii> vep;
typedef map<int,int> mpii;
typedef map<char,int> mpci;
typedef map<string,int> mpsi;
typedef deque<int> deqi;
typedef deque<char> deqc;
typedef priority_queue<int> mxpq;
typedef priority_queue<int,vector<int>,greater<int> > mnpq;
typedef priority_queue<pii> mxpqii;
typedef priority_queue<pii,vector<pii>,greater<pii> > mnpqii;
const int maxn=500005;
const int inf=0x3f3f3f3f3f3f3f3f;
const int MOD=100000007;
const db eps=1e-10;
int qpow(int a,int b){int tmp=a%MOD,ans=1;while(b){if(b&1){ans*=tmp,ans%=MOD;}tmp*=tmp,tmp%=MOD,b>>=1;}return ans;}
int lowbit(int x){return x&-x;}
int max(int a,int b){return a>b?a:b;}
int min(int a,int b){return a<b?a:b;}
int mmax(int a,int b,int c){return max(a,max(b,c));}
int mmin(int a,int b,int c){return min(a,min(b,c));}
void mod(int &a){a+=MOD;a%=MOD;}
bool chk(int now){}
int half(int l,int r){while(l<=r){int m=(l+r)/2;if(chk(m))r=m-1;else l=m+1;}return l;}
int ll(int p){return p<<1;}
int rr(int p){return p<<1|1;}
int mm(int l,int r){return (l+r)/2;}
int lg(int x){if(x==0) return 1;return (int)log2(x)+1;}
bool smleql(db a,db b){if(a<b||fabs(a-b)<=eps)return true;return false;}
db len(db a,db b,db c,db d){return sqrt((a-c)*(a-c)+(b-d)*(b-d));}
bool isp(int x){if(x==1)return false;if(x==2)return true;for(int i=2;i*i<=x;++i)if(x%i==0)return false;return true;}
inline int read(){
    char ch=getchar();int s=0,w=1;
    while(ch<48||ch>57){if(ch=='-')w=-1;ch=getchar();}
    while(ch>=48&&ch<=57){s=(s<<1)+(s<<3)+ch-48;ch=getchar();}
    return s*w;
}
inline void write(int x){
    if(x<0)putchar('-'),x=-x;
    if(x>9)write(x/10);
    putchar(x%10+48);
}

int n,m;
int a[maxn];
string s;
map<string,int> mp;
typedef map<string,int>::iterator it;
vei v;

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0),cout.tie(0);
    cin>>n>>m;
    re(i,1,n) cin>>a[i];
    re(i,1,m) cin>>s,mp[s]++;
    sort(a+1,a+1+n);
    for(it i=mp.begin();i!=mp.end();++i){
        int t=i->snd;
        v.pub(t);
    }
    int mx=-inf,mn=inf,cnt,i,j;
    sort(v.begin(),v.end());
    cnt=0,i=1,j=0;
    while(i<=n&&j<v.size()){
        cnt+=a[i]*v[j];
        i++,j++;
    }
    mx=max(mx,cnt),mn=min(mn,cnt);
    cnt=0,i=n,j=v.size()-1;
    while(i>=1&&j>=0){
        cnt+=a[i]*v[j];
        i--,j--;
    }
    mx=max(mx,cnt),mn=min(mn,cnt);
    sort(v.begin(),v.end(),greater<int>());
    cnt=0,i=1,j=0;
    while(i<=n&&j<v.size()){
        cnt+=a[i]*v[j];
        i++,j++;
    }
    mx=max(mx,cnt),mn=min(mn,cnt);
    cnt=0,i=n,j=v.size()-1;
    while(i>=1&&j>=0){
        cnt+=a[i]*v[j];
        i--,j--;
    }
    mx=max(mx,cnt),mn=min(mn,cnt);
    cout<<mn<<' '<<mx;
    return 0;
}