po3580SuperMemo（splay)
操作不少，不过都是一些基本的操作，增删，旋转，逆转，询问最小。
注意一点：T<0时 让t=0；
旋转的时候，是顺时针旋转，数据范围在int内。
刚开始旋转转错方向了。。
1 #include <iostream> 2 #include<cstdio> 3 #include<cstring> 4 #include<algorithm> 5 #include<stdlib.h> 6 #include<vector> 7 #include<cmath> 8 #include<queue> 9 #include<set> 10 using namespace std; 11 #define N 200010 12 #define LL long long 13 #define INF 0xfffffff 14 #define key_value ch[ch[root][1]][0] 15 const double eps = 1e-8; 16 const double pi = acos(-1.0); 17 const double inf = ~0u>>2; 18 using namespace std; 19 int a[N]; 20 struct splay_tree 21 { 22 int pre[N],size[N]; 23 int ch[N][2]; 24 int root,tot; 25 int lz2[N]; 26 LL s[N],lz1[N],key[N]; 27 // void dfs(int x) 28 // { 29 // if(x) 30 // { 31 // dfs(ch[x][0]); 32 // printf("结点%2d:左儿子 %2d 右儿子 %2d 父结点 %2d size=%2d,key=%2d lz1 = %d lz2 = %d min = %d\n", 33 // x,ch[x][0],ch[x][1],pre[x],size[x],key[x],lz1[x],lz2[x],s[x]); 34 // dfs(ch[x][1]); 35 // } 36 // } 37 // void debug() 38 // { 39 // printf("root:%d\n",root); 40 // dfs(root); 41 // } 42 //以上用于debug*/ 43 void newnode(int &x,int v,int fa)//新建一结点 44 { 45 x = ++tot; 46 ch[x][0]=ch[x][1] = 0; 47 pre[x] = fa; 48 lz1[x] = lz2[x] = 0; 49 size[x] = 1; 50 s[x] = v; 51 key[x] = v; 52 } 53 void pushdown(int w) 54 { 55 int l = ch[w][0],r = ch[w][1]; 56 if(lz1[w]) 57 { 58 lz1[l] += lz1[w]; 59 lz1[r] += lz1[w]; 60 s[l]+=lz1[w]; 61 s[r]+=lz1[w]; 62 key[l]+=lz1[w]; 63 key[r]+=lz1[w]; 64 lz1[w] = 0; 65 } 66 if(lz2[w]) 67 { 68 lz2[l]^=lz2[w]; 69 lz2[r]^=lz2[w]; 70 swap(ch[w][0],ch[w][1]); 71 lz2[w] = 0; 72 } 73 } 74 void pushup(int w) 75 { 76 size[w] = size[ch[w][0]]+size[ch[w][1]]+1; 77 s[w] = key[w]; 78 if(ch[w][0]) 79 s[w] = min(s[w],s[ch[w][0]]); 80 if(ch[w][1]) 81 s[w] = min(s[w],s[ch[w][1]]); 82 } 83 void rotate(int r,int kind) 84 { 85 int y = pre[r]; 86 pushdown(y); 87 pushdown(r); 88 ch[y][!kind] = ch[r][kind]; 89 pre[ch[r][kind]] = y; 90 if(pre[y]) 91 { 92 ch[pre[y]][ch[pre[y]][1]==y] = r; 93 } 94 pre[r] = pre[y]; 95 ch[r][kind] = y; 96 pre[y] = r; 97 pushup(y); 98 pushup(r); 99 } 100 void splay(int r,int goal) 101 { 102 pushdown(r); 103 while(pre[r]!=goal) 104 { 105 if(pre[pre[r]]==goal) 106 { 107 rotate(r,ch[pre[r]][0]==r); 108 } 109 else 110 { 111 int y = pre[r]; 112 int kind = (ch[pre[y]][0]==y); 113 if(ch[y][kind]==r) 114 { 115 rotate(r,!kind); 116 rotate(r,kind); 117 } 118 else 119 { 120 rotate(y,kind); 121 rotate(r,kind); 122 } 123 } 124 } 125 pushup(r); 126 if(goal==0) root = r; 127 } 128 int get_k(int k) 129 { 130 int r = root; 131 pushdown(r); 132 while(size[ch[r][0]]+1!=k) 133 { 134 if(size[ch[r][0]]>=k) 135 r = ch[r][0]; 136 else 137 { 138 k-=(size[ch[r][0]]+1); 139 r = ch[r][1]; 140 } 141 pushdown(r); 142 } 143 return r; 144 } 145 void add(int l,int r,int k) 146 { 147 splay(get_k(l),0); 148 splay(get_k(r+2),root); 149 lz1[key_value]+=k; 150 s[key_value]+=k; 151 key[key_value]+=k; 152 pushup(ch[root][1]); 153 pushup(root); 154 } 155 LL query(int l,int r) 156 { 157 splay(get_k(l),0); 158 splay(get_k(r+2),root); 159 return s[key_value]; 160 } 161 void reverse(int l,int r) 162 { 163 splay(get_k(l),0); 164 splay(get_k(r+2),root); 165 lz2[key_value]^=1; 166 pushup(ch[root][1]); 167 pushup(root); 168 } 169 void revolve(int l,int r,int k) 170 { 171 splay(get_k(r-k+1),0); 172 splay(get_k(r+2),root); 173 int nod = key_value; 174 key_value = 0; 175 pushup(ch[root][1]); 176 pushup(root); 177 178 splay(get_k(l),0); 179 splay(get_k(l+1),root); 180 key_value = nod; 181 pre[nod] = ch[root][1]; 182 pushup(ch[root][1]); 183 pushup(root); 184 } 185 void insert(int k,int p) 186 { 187 splay(get_k(k),0); 188 splay(get_k(k+1),root); 189 newnode(key_value,p,ch[root][1]); 190 pushup(ch[root][1]); 191 pushup(root); 192 } 193 void updelete(int k) 194 { 195 splay(get_k(k),0); 196 splay(get_k(k+2),root); 197 key_value = 0; 198 pushup(ch[root][1]); 199 pushup(root); 200 } 201 void build(int &x,int l,int r,int fa) 202 { 203 int m = (l+r)>>1; 204 if(l>r) return ; 205 newnode(x,a[m],fa); 206 build(ch[x][0],l,m-1,x); 207 build(ch[x][1],m+1,r,x); 208 pushup(x); 209 } 210 void init(int o) 211 { 212 int i; 213 for(i = 1; i <= o ; i++) 214 scanf("%d",&a[i]); 215 size[0] = ch[0][0] = ch[0][1] = key[0] = lz1[0] = lz2[0] = s[0] = 0; 216 root = tot = 0; 217 newnode(root,0,0); 218 newnode(ch[root][1],0,root); 219 build(ch[ch[root][1]][0],1,o,ch[root][1]); 220 size[root] = 2; 221 pushup(ch[root][1]); 222 pushup(root); 223 } 224 // void work() 225 // { 226 // for(int i = 1; i <= size[root] ;i++) 227 // cout<<key[get_k(i)]<<" "; 228 // puts(""); 229 // } 230 } SP; 231 int main() 232 { 233 int n,q,k,x,y; 234 char sq[10]; 235 while(scanf("%d",&n)!=EOF) 236 { 237 SP.init(n); 238 scanf("%d",&q); 239 while(q--) 240 { 241 scanf("%s",sq); 242 if(sq[0]=='A') 243 { 244 scanf("%d%d%d",&x,&y,&k); 245 SP.add(x,y,k); 246 } 247 else if(strcmp(sq,"REVERSE")==0) 248 { 249 scanf("%d%d",&x,&y); 250 SP.reverse(x,y); 251 } 252 else if(strcmp(sq,"REVOLVE")==0) 253 { 254 scanf("%d%d%d",&x,&y,&k); 255 if(k<=0) continue; 256 k = k%(y-x+1); 257 SP.revolve(x,y,k); 258 } 259 else if(sq[0]=='I') 260 { 261 scanf("%d%d",&k,&x); 262 SP.insert(k+1,x); 263 } 264 else if(sq[0]=='D') 265 { 266 scanf("%d",&k); 267 SP.updelete(k); 268 } 269 else if(sq[0]=='M') 270 { 271 scanf("%d%d",&x,&y); 272 printf("%d\n",SP.query(x,y)); 273 } 274 //SP.work(); 275 } 276 } 277 return 0; 278 }
