这道题提醒了我:
1、交之前要删文件
2、v不要打成mn
3、maintain的位置
4、pushdown pushdown pushdown
1 #include<cstdio> 2 #include<cstring> 3 #include<iostream> 4 #include<cstdlib> 5 #include<cmath> 6 #include<algorithm> 7 #define rep(i,l,r) for(int i=l;i<r;i++) 8 #define clr(a,s) memset(a,x,sizeof(a)) 9 using namespace std; 10 int read() 11 { 12 int ans=0; 13 char c=getchar(); 14 while(!isdigit(c)) c=getchar(); 15 while(isdigit(c)){ 16 ans=ans*10+c-'0'; 17 c=getchar(); 18 } 19 return ans; 20 } 21 const int maxn=100005,inf=0x3fffffff; 22 struct node*null,*pt; 23 struct node{ 24 int v,s,mn; 25 bool rev; 26 node*ch[2]; 27 inline int cmp(int k) const{ 28 k-=ch[0]->s; 29 if(k==1) return -1; 30 return k<=0?0:1; 31 } 32 inline void maintain(){ 33 s=ch[0]->s+ch[1]->s+1; 34 mn=min(v,min(ch[0]->mn,ch[1]->mn)); 35 } 36 inline void pushdown(){ 37 if(rev){ 38 rev=0; 39 ch[0]->rev^=1; 40 ch[1]->rev^=1; 41 swap(ch[0],ch[1]); 42 } 43 } 44 }; 45 void rotate(node*&o,int d) 46 { 47 node*k=o->ch[d^1]; 48 o->ch[d^1]=k->ch[d]; 49 k->ch[d]=o; 50 o->maintain();k->maintain(); 51 o=k; 52 } 53 void splay(node*&o,int k) 54 { 55 o->pushdown(); 56 int d=o->cmp(k); 57 if(d==-1) return; 58 if(d==1) k-=o->ch[0]->s+1; 59 node*p=o->ch[d]; 60 p->pushdown(); 61 int d2=p->cmp(k); 62 int k2=(d2?k-p->ch[0]->s-1:k); 63 if(d2!=-1){ 64 splay(p->ch[d2],k2); 65 d==d2?rotate(o,d^1):rotate(o->ch[d],d); 66 } 67 rotate(o,d^1); 68 } 69 struct num{ 70 int v,r; 71 inline bool operator <(const num&an)const{ 72 return (v<an.v)||(v==an.v&&r<an.r); 73 } 74 }; 75 node*newnode(int k) 76 { 77 pt->ch[0]=null; 78 pt->ch[1]=null; 79 pt->v=pt->mn=k; 80 pt->rev=0; 81 pt->s=1; 82 return pt++; 83 } 84 num a[maxn]; 85 int b[maxn]; 86 node*build(int l,int r) 87 { 88 if(l>=r) return null; 89 int mid=(l+r)>>1; 90 node*o=newnode(b[mid]); 91 if(l<mid) o->ch[0]=build(l,mid); 92 if(mid+1<r) o->ch[1]=build(mid+1,r); 93 o->maintain(); 94 return o; 95 } 96 int cnt=0; 97 void dfs(node*o) 98 { 99 if(o==null) return; 100 o->pushdown(); 101 dfs(o->ch[0]); 102 printf("%d ",o->v); 103 dfs(o->ch[1]); 104 } 105 int find(node*o,int k) 106 { 107 o->pushdown(); 108 if(o->v==k) return o->ch[0]->s+1; 109 if(o->ch[0]->mn==k) return find(o->ch[0],k); 110 return find(o->ch[1],k)+o->ch[0]->s+1; 111 } 112 int n,ans[maxn]; 113 node x[maxn],*root; 114 void init() 115 { 116 pt=x; 117 null=newnode(inf); 118 null->s=0; 119 root=build(0,n+2); 120 } 121 int main() 122 { 123 n=read(); 124 rep(i,0,n){ 125 a[i].v=read(); 126 a[i].r=i; 127 } 128 sort(a,a+n); 129 rep(i,0,n) b[a[i].r+1]=i+1; 130 b[n+1]=inf; 131 b[0]=inf; 132 init(); 133 rep(i,1,n+1){ 134 splay(root,i); 135 ans[i]=find(root,i); 136 printf("%d",ans[i]-1); 137 if(i!=n) printf(" "); 138 splay(root->ch[1],ans[i]-root->ch[0]->s); 139 root->ch[1]->ch[0]->rev^=1; 140 } 141 return 0; 142 }