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) {scanf ("%1d", tree[k].sum); return ; } intMid = (tree[k].l + TREE[K].R) >>1; Build (Lson, TREE[K].L, mid); Build (Rson, mid+1, TREE[K].R); Tree[k].sum= Tree[lson].sum +tree[rson].sum; } voidPush_down (intk) {if(Tree[k].tag%2==1) Tree[lson].sum= (tree[lson].r-tree[lson].l+1)-Tree[lson].sum, Tree[rson].sum= (tree[rson].r-tree[rson].l+1)-tree[rson].sum; Tree[lson].tag+=Tree[k].tag; Tree[rson].tag+=Tree[k].tag; Tree[k].tag=0; } voidUpdateintKintLintR) {if(TREE[K].L >= l TREE[

Update the color in the interval Total number of colors in the output range # Include [Line Segment tree] HDU 5025 a lost upt mayor's performance art

Question Link There is a sequence with N length. The initial staining is 2. There are two operations: p x, Y, Z, and the interval x --- y is Z, and the other is q X, y: the query interval X -- y has several colors, and the output will overwrite Analysis: the value of LZ [] is 0, indicating that the following colors are inconsistent. The value is> 0. f [] indicates the number of colors under the node, which is a binary representation of 30 colors. At the beginning, 1 1 #include HDU