Run Code
|
API
|
Code Wall
|
Misc
|
Feedback
|
Login
|
Theme
|
Privacy
|
Patreon
Lowest common ancestor in binary tree
#include <iostream> #include <list> #include <vector> using namespace std; struct BinTree { int data; BinTree *left; BinTree *right; BinTree(int d, BinTree* l, BinTree* r): data(d), left(l), right(r) {} }; BinTree* LowestCommonAncestor(BinTree* root, int a, int b) { if (!root) return NULL; if (a == root->data || b == root->data) return root; BinTree* lhcLeft = LowestCommonAncestor(root->left, a, b); BinTree* lhcRight = LowestCommonAncestor(root->right, a, b); if (lhcLeft && lhcRight) return root; if (lhcLeft) return lhcLeft; if (lhcRight) return lhcRight; return NULL; } // 4 // / \ // 2 8 // / \ / \ // 1 3 6 9 // / \ // 5 7 int main() { BinTree *h = new BinTree(7, NULL, NULL); BinTree *j = new BinTree(5, NULL, NULL); BinTree *g = new BinTree(9, NULL, NULL); BinTree *f = new BinTree(6, j, h); BinTree *e = new BinTree(3, NULL, NULL); BinTree *d = new BinTree(1, NULL, NULL); BinTree *c = new BinTree(8, f, g); BinTree *b = new BinTree(2, d, e); BinTree *a = new BinTree(4, b, c); cout << LowestCommonAncestor(a, 1, 3)->data; }
run
|
edit
|
history
|
help
0
Test 13(2020)
Dijkstra
-fno-elide-constructors
basic caculate i
ADAKOHL - hpclearn
Matrix rotation
C++
good triplet
BLREDSET
VectorNormFn