<JZOJ5937&luogu3944>斩杀计划&肮脏的牧师

第一次写桶排相关题....

#include<cstdio>
#include<iostream>
#define rint register int
template <class T> inline void read(T &X)
{
    X=0;int W=0;char ch=0;
    while(!isdigit(ch))W|=ch=='-',ch=getchar();
    while(isdigit(ch))X=(X<<3)+(X<<1)+(ch^48),ch=getchar();
    X=W?-X:X;return;
}
int n,m,a[5000010],cnt[30010],ans=0,cnt1=0,cnt2=0,cnt3=0,num=-1;
int main()
{
    freopen("zhanshajihua.in","r",stdin);
    freopen("zhanshajihua.out","w",stdout);
    read(n),read(m);
    for(rint i=1;i<=n;++i)read(a[i]),cnt[a[i]]++;
    for(rint i=1;i<=30000-3;i+=3)
    {
        ans+=cnt[i];cnt1+=cnt[i];
        ans+=cnt[i+1]*2;cnt2+=cnt[i+1];
        ans+=cnt[i+2]*3;cnt3+=cnt[i+2];
        ++num;
        if(ans>=m)break;
    }
    while(ans>=m+3 && cnt3){ans-=3;--cnt3;}
    while(ans>=m+1 && cnt1){--ans;--cnt1;}
    while(ans>=m+2 && cnt2){ans-=2;--cnt2;}
    if(ans>=m)printf("%d %d
",num,(cnt1+cnt2)+cnt3*4+num);
    else printf("-1
");//luogu “Human Cannot Win Dog”
return 0;
}