线段树成段更新 poj 3325

#include<iostream>
#include<cstring>
#include<algorithm>
#include<cstdio>
#include<vector>
#include<sstream>
#include<string>
#include<climits>
#include<stack>
#include<set>
#include<bitset>
#include<cmath>
#include<deque>
#include<map>
#include<queue>
#define iinf 2000000000
#define linf 1000000000000000000LL
#define dinf 1e200
#define eps 1e-5
#define all(v) (v).begin(),(v).end()
#define sz(x)  x.size()
#define pb push_back
#define mp make_pair
#define lng long long
#define sqr(a) ((a)*(a))
#define pii pair<int,int>
#define pll pair<lng,lng>
#define pss pair<string,string>
#define pdd pair<double,double>
#define X first
#define Y second
#define pi 3.14159265359
#define ff(i,xi,n) for(int i=xi;i<=(int)(n);++i)
#define ffd(i,xi,n) for(int i=xi;i>=(int)(n);--i)
#define ffl(i,r) for(int i=head[r];i!=-1;i=edge[i].next)
#define cc(i,j) memset(i,j,sizeof(i))
#define two(x)			((lng)1<<(x))
#define N 131072
#define M 1000000
#define lson l , mid , rt << 1
#define rson mid + 1 , r , rt << 1 | 1
#define Mod  n
#define Pmod(x) (x%Mod+Mod)%Mod
using namespace std;
typedef vector<int>  vi;
typedef vector<string>  vs;
typedef unsigned int uint;
typedef unsigned lng ulng;
template<class T> inline void checkmax(T &x,T y){if(x<y) x=y;}
template<class T> inline void checkmin(T &x,T y){if(x>y) x=y;}
template<class T> inline T Min(T x,T y){return (x>y?y:x);}
template<class T> inline T Max(T x,T y){return (x<y?y:x);}
template<class T> T gcd(T a,T  b){return (a%b)==0?b:gcd(b,a%b);}
template<class T> T lcm(T a,T b){return a*b/gcd(a,b);}
template<class T> T Abs(T a){return a>0?a:(-a);}
template<class T> inline T lowbit(T n){return (n^(n-1))&n;}
template<class T> inline int countbit(T n){return (n==0)?0:(1+countbit(n&(n-1)));}
template<class T> inline bool isPrimeNumber(T n)
{if(n<=1)return false;for (T i=2;i*i<=n;i++) if (n%i==0) return false;return true;}
int clo[N<<2],XOR[N<<2],le,ri;
bool in
;
inline void  FXOR(int rt)
{
if(clo[rt]!=-1) clo[rt]^=1;
else  XOR[rt]^=1;
}
inline void pushdown(int rt)
{
if(clo[rt]!=-1)
{
clo[rt<<1]=clo[rt<<1|1]=clo[rt];
XOR[rt<<1]=XOR[rt<<1|1]=0;
clo[rt]=-1;
}
if(XOR[rt])
{
FXOR(rt<<1);
FXOR(rt<<1|1);
XOR[rt]=0;
}
}
void update(int L,int R,char opt,int l,int r,int rt)
{
if(L<=l&&r<=R)
{
if(opt=='U')
{
clo[rt]=1;
XOR[rt]=0;
}
else
if(opt=='D')
{
clo[rt]=0;
XOR[rt]=0;
}
else
if(opt=='C'||opt=='S')
{
FXOR(rt);
}
return ;
}
pushdown(rt);
int mid=(l+r)>>1;
if(L<=mid)
update(L,R,opt,lson);
else
if(opt=='I'||opt=='C')
{
clo[rt<<1]=0;
XOR[rt<<1]=0;
}
if(R>mid)
update(L,R,opt,rson);
else
if(opt=='I'||opt=='C')
{
clo[rt<<1|1]=0;
XOR[rt<<1|1]=0;
}
}
void query(int l,int r,int rt)
{
if(clo[rt]==1)
{
ff(i,l,r)
in[i]=1;
return ;
}
else
if(clo[rt]==0) return ;
pushdown(rt);
int mid=(l+r)>>1;
query(lson);
query(rson);
}
int main()
{
// freopen("data.in","r",stdin);
char opt,a,b;
clo[1]=0; XOR[1]=0;
while(~scanf("%c %c%d,%d%c",&opt,&a,&le,&ri,&b))
{
le<<=1,ri<<=1;
if(a=='(') ++le;
if(b==')') --ri;
if(le>ri)
{
if(opt=='C'||opt=='I')
clo[1]=0,XOR[1]=0;
}
else
update(le,ri,opt,0,N,1);
getchar();
}
query(0,N,1);
bool f=false;
int fr=-1,re;
ff(i,0,N)
{
if(in[i])
{
if(fr==-1)
{
fr=i;
}
re=i;
}
else
{
if(fr!=-1)
{
if(f) putchar(' ');
f=true;
printf("%c%d,%d%c",fr&1?'(':'[',fr>>1,(re+1)/2,re&1?')':']');
fr=-1;
}
}
}
if(!f) printf("empty set");
puts("");
return 0;
}