lazy写崩了…….

查了好久

/*
U—> [l,r]–>1
I—> [1,l-1] [r+1,+无穷] –>0
D—> [l,r]–>0
C—> [1,l-1] [r+1,+无穷]–>0 xor[l,r]
S—> [l,r]–>xor
*/

//By SiriusRen
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
#define maxn 140000
struct Tree{int lazy;bool cover;Tree(){lazy=-1;}}tree[maxn*16];//=0 不选  =1 选   =2 xor
int xx,yy,vis[maxn*2];
char op,Left,Right,f;
void push_down(int pos){int lson=pos<<1,rson=pos<<1|1;if(tree[pos].lazy==2){if(tree[lson].lazy==-1)tree[lson].lazy=2,tree[lson].cover=!tree[lson].cover;else if(tree[lson].lazy==2)tree[lson].lazy=-1,tree[lson].cover=!tree[lson].cover;else tree[lson].lazy=!tree[lson].lazy,tree[lson].cover=!tree[lson].cover;if(tree[rson].lazy==-1)tree[rson].lazy=2,tree[rson].cover=!tree[rson].cover;else if(tree[rson].lazy==2)tree[rson].lazy=-1,tree[rson].cover=!tree[rson].cover;else tree[rson].lazy=!tree[rson].lazy,tree[rson].cover=!tree[rson].cover;}else tree[lson].cover=tree[rson].cover=tree[pos].lazy,tree[lson].lazy=tree[rson].lazy=tree[pos].lazy;tree[pos].lazy=-1;
}
void update(int l,int r,int pos,int L,int R,int id){if(l>=L&&r<=R){if(id!=2)tree[pos].cover=id,tree[pos].lazy=id;else{if(tree[pos].lazy==-1)tree[pos].lazy=2;else if(tree[pos].lazy==2)tree[pos].lazy=-1;else tree[pos].lazy=!tree[pos].lazy;tree[pos].cover=!tree[pos].cover;}return;}if(~tree[pos].lazy)push_down(pos);int mid=(l+r)>>1,lson=pos<<1,rson=pos<<1|1;if(mid>=R)update(l,mid,lson,L,R,id);else if(mid<L)update(mid+1,r,rson,L,R,id);else update(l,mid,lson,L,R,id),update(mid+1,r,rson,L,R,id);
}
void query(int l,int r,int pos,int x){if(~tree[pos].lazy)push_down(pos);if(l==r){vis[l]=tree[pos].cover;return;}int mid=(l+r)>>1,lson=pos<<1,rson=pos<<1|1;if(mid>=x)query(l,mid,lson,x);else query(mid+1,r,rson,x);
}
int main(){while(scanf("%c %c%d,%d%c",&op,&Left,&xx,&yy,&Right)!=EOF){xx<<=1,yy<<=1;if(Left=='(')xx++;if(Right==')')yy--;if(xx>yy)xx=yy=maxn-1;if(op=='U')update(0,maxn,1,xx,yy,1);else if(op=='I'){if(xx)update(0,maxn,1,0,xx-1,0);update(0,maxn,1,yy+1,maxn,0);}else if(op=='D')update(0,maxn,1,xx,yy,0);else if(op=='C'){if(xx)update(0,maxn,1,0,xx-1,0);update(0,maxn,1,yy+1,maxn,0);update(0,maxn,1,xx,yy,2);}else if(op=='S')update(0,maxn,1,xx,yy,2);getchar();}for(int i=0;i<maxn;i++)query(0,maxn,1,i);xx=-1;for(int i=0;i<135000;i++){if(vis[i]&&~xx)yy=i;else if(!vis[i]){if(~xx){if(f)printf(" ");if(!f)f=1;if(xx&1)putchar('(');else putchar('[');printf("%d,%d",xx>>1,(yy+1)>>1);if(yy&1)putchar(')');else putchar(']');}xx=-1;}else if(vis[i]&&xx==-1)xx=yy=i;}if(!f)printf("empty set");
}