OJ-Problems-Source/HDOJ/3950_autoAC.cpp
2016-09-04 14:19:03 +08:00

196 lines
5.7 KiB
C++

#include <iostream>
#include <cstdio>
#include <cstring>
#include <set>
using namespace std;
#define LL(x) (x<<1)
#define RR(x) (x<<1|1)
#define MID(a,b) (a+((b-a)>>1))
#define INF (1<<30)
const int N=50005;
int n,q,ed[N];
int st_len,ed_len;
struct Segtree
{
set<int> T[N];
int st[N*4],len[N*4];
void PushUp(int ind)
{
if(st[LL(ind)]<st[RR(ind)])
{
st[ind]=st[LL(ind)];
len[ind]=len[LL(ind)];
}
else
{
st[ind]=st[RR(ind)];
len[ind]=len[RR(ind)];
}
}
void build(int lft,int rht,int ind)
{
st[ind]=INF;
if(lft==rht) T[lft].clear();
else
{
int mid=MID(lft,rht);
build(lft,mid,LL(ind));
build(mid+1,rht,RR(ind));
}
}
void updata(int pos,int ist,bool add,int ind,int lft,int rht)
{
if(lft==rht)
{
if(add) T[lft].insert(ist);
else T[lft].erase(ist);
if(T[lft].size()==0) st[ind]=INF;
else
{
len[ind]=lft; st[ind]=*(T[lft].begin());
}
}
else
{
int mid=MID(lft,rht);
if(pos<=mid) updata(pos,ist,add,LL(ind),lft,mid);
else updata(pos,ist,add,RR(ind),mid+1,rht);
PushUp(ind);
}
}
pair<int,int> query(int ist,int ied,int ind,int lft,int rht)
{
if(ist<=lft&&rht<=ied) return make_pair(st[ind],len[ind]);
else
{
int mid=MID(lft,rht);
pair<int,int> tmp1,tmp2; tmp1.first=INF,tmp2.first=INF;
if(ist<=mid) tmp1=query(ist,ied,LL(ind),lft,mid);
if(ied> mid) tmp2=query(ist,ied,RR(ind),mid+1,rht);
if(tmp1.first<tmp2.first) return tmp1;
else return tmp2;
}
}
}seg;
struct BIT
{
int T[N],sum;
void init(){memset(T,0,sizeof(T));sum=0;}
int lowbit(int x){return x&-x;}
void insert(int x,int add)
{
sum+=add;
while(x<N)
{
T[x]+=add; x+=lowbit(x);
}
}
int query(int k)
{
int ind=0;
for(int i=20;i>=0;i--)
{
ind^=(1<<i);
if(ind<N&&k>T[ind]) k-=T[ind];
else ind^=(1<<i);
}
return ind+1;
}
int getsum()
{
return sum;
}
}bit;
int calu(int st,int len,int m,int a,int b)
{
int ed=st+len-1;
return max(ed-m-b+1,st);
}
bool judge(int st1,int st2,int &ilen,int &ist)
{
ist=st1;
if(st1>st2) return false;
ilen=st2-st1+1;
return true;
}
int main()
{
int t,t_cnt=0;
scanf("%d",&t);
while(t--)
{
scanf("%d%d",&n,&q);
seg.build(1,n,1); bit.init();
st_len=n,ed_len=n;
printf("Case #%d:\n",++t_cnt);
while(q--)
{
char cmd[5]; scanf("%s",cmd);
if(cmd[0]=='A')
{
int m,a,b; scanf("%d%d%d",&m,&a,&b);
if(st_len>=m)
{
if(st_len==n)
{
ed[1]=m; bit.insert(1,1); st_len=0; ed_len-=m;
printf("%d\n",1);
}
else
{
int tmp=calu(1,st_len,m,a,b);
ed[tmp]=tmp+m-1; bit.insert(tmp,1);
printf("%d\n",tmp);
int len,st;
if(judge(ed[tmp]+1,st_len,len,st)) seg.updata(len,st,1,1,1,n);
st_len=tmp-1;
}
}
else
{
pair<int,int> res=seg.query(m,m+a+b,1,1,n);
if(res.first!=INF)
{
seg.updata(res.second,res.first,0,1,1,n);
int tmp=calu(res.first,res.second,m,a,b);
ed[tmp]=tmp+m-1; bit.insert(tmp,1);
printf("%d\n",tmp);
int len,st;
if(judge(res.first,tmp-1,len,st)) seg.updata(len,st,1,1,1,n);
if(judge(ed[tmp]+1,res.first+res.second-1,len,st)) seg.updata(len,st,1,1,1,n);
}
else
{
if(ed_len<m) puts("-1");
else
{
int tmp=n-ed_len+1;
ed[tmp]=tmp+m-1; ed_len=n-ed[tmp]; bit.insert(tmp,1);
printf("%d\n",tmp);
}
}
}
}
else
{
int k; scanf("%d",&k);
if(k>bit.getsum()||k<=0) continue;
int st=bit.query(k);
int st1=1;
if(k>1) st1=ed[bit.query(k-1)]+1;
int len1=st-st1;
if(len1>0&&st1!=1) seg.updata(len1,st1,0,1,1,n);
int st2=bit.query(k+1)-1,len2;
if(st2>n) len2=0,st2=n;
else len2=st2-ed[st];
if(len2>0&&!(st2==n)) seg.updata(len2,ed[st]+1,0,1,1,n);
if(st1!=1&&st2!=n) seg.updata(st2-st1+1,st1,1,1,1,n);
if(st1==1) st_len=st2-st1+1;
if(st2==n) ed_len=st2-st1+1;
bit.insert(st,-1);
}
}
}
return 0;
}