tree[n].cmax = max ( tree[n*2].cmax , tree[n*2+1].cmax ) + tree[n].offt; } int query(int n, int b, int e, int i, int j, int offt) { if (b>e || i>j || b>j || e if (b>=i && e<=j) return tree[n].cmax + offt; //the increment of current node is...
I am learning segment tree with lazy propagation but i can't find good tutorial. Can anyone post a code that implements this two operation with segment tree and lazy propagation: a-add a value to every element in a interval b-get the. sum of interval. Thanks in advance....
}intmid = node[rt].l+node[rt].r>>1; add_one(rt<<1|pos>mid,pos,val); pushup(rt); }//区域更新//所谓lazy就是只有当需要pushdown时才pushdown,query同voidadd(intrt,intl,intr,intval){ pushdown(rt);//这一行的作用见https://jecvay.com/2014/11/segment-tree-lazy-design.htmlif(node[rt...
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option=com_onlinejudge&Itemid=8&page=show_problem&problem=2397it is a level 4 problem in uva online judge about segment tree.i used segment tree with lazy updates but i got time limit for 20 times!can any one help me?does this problem have some particular tip?
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lazy propagation,segment tree,lightoj +5 faiyaz26 13 years ago 7 vitar 13 years ago,#| +11 Here you have just 2 different kind of updates: 1)add a linear function 2)set a linear function. It is convenient to consider indexes of an array as point on X axis. Than you can transform...
NoCap09 → Unwritten Rules of Codeforces – Things I Wish I Knew Earlier Detailed → Loser_ Blog Teams Submissions Groups ContestsLoser_'s blog Lazy propagation problem from CodeChef needs help By Loser_, 4 years ago, I was doing a problem from codechef Multiples of 3 but could not figu...
Hello,i have a question concerning lazy update.This question is generally for every lazy update use. When i mark some node with a flag,i don't actually update it,i just mark it.So a node with a mark on it isn't updated. When I "go down" on some son and see that my node is ...