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NeptuneFrank 发表于 2015-10-19 03:35:29 | 显示全部楼层 |阅读模式

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1.+2 3 sum
-google 1point3acres

2. Given set of points in 2d grid space. Find a grid point such that sum
of distance from all the points to this common point is minimum.

3. Print a binary tree by vertical level order

4. Calculate the average of each level of a tree.
. more info on
5. how do you find the lowest common ancestor of two nodes in a binary tree

6. ??. from:
given a digit , return the count of the possible output
eg. '1313' --- 4
acac mac mm acm
'101' --1
cannot discard any digit .

7.Given a matrix, calculate the sum of a sub matrix given the start and end indices of the sub matrix (do dynamical programming on this)

8. sort 3 color in array (use self-over writing with two ends.).
. 鍥磋鎴戜滑@1point 3 acres

9.+1 implement sqrt() with integer (use Binary Search.)

10. find if one string is one edit distance away from the other string (check all possible cases)

11. get the n-th Fibonacci number. 涓浜-涓夊垎-鍦帮紝鐙鍙戝竷

12. find the depth of a binary tree,

13. merge two arrays, A + B -> A ( do it in-place, i feel. Why do not you merge sorted arrays from their largest element? (from max instead? very good question))

14. Check to see if one array is a subset of another.

15. balance trees with weight???

16. add binary(leetcode)
. 涓浜-涓夊垎-鍦帮紝鐙鍙戝竷
17.+1 binary tree print all paths from root to leef
How to do it iteratively? 用一个stack实现preorder来做?

Given a binary tree, print out all of its root-to-leaf 鏉ユ簮涓浜.涓夊垎鍦拌鍧.
paths, one per line. Uses a recursive helper to do the work.
*/. more info on
void printPaths(struct node* node) {
  int path[1000];
  printPathsRecur(node, path, 0);
. 鍥磋鎴戜滑@1point 3 acres
Recursive helper function -- given a node, and an array containing
the path from the root node up to but not including this node,-google 1point3acres
print out all the root-leaf paths.
void printPathsRecur(struct node* node, int path[], int pathLen) {
  if (node==NULL) return;.鐣欏璁哄潧-涓浜-涓夊垎鍦
. more info on
  // append this node to the path array
  path[pathLen] = node->data;

  // it's a leaf, so print the path that led to here-google 1point3acres
  if (node->left==NULL && node->right==NULL) {. 鐣欏鐢宠璁哄潧-涓浜╀笁鍒嗗湴
    printArray(path, pathLen); 鏉ユ簮涓浜.涓夊垎鍦拌鍧.
  }. 鍥磋鎴戜滑@1point 3 acres
  else {
  // otherwise try both subtrees
    printPathsRecur(node->left, path, pathLen);
    printPathsRecur(node->right, path, pathLen);
. Waral 鍗氬鏈夋洿澶氭枃绔,
// Utility that prints out an array on a line.
void printArray(int ints[], int len) {
  int i;
  for (i=0; i<len; i++) {.1point3acres缃
    printf("%d ", ints);
  printf("\n");. From 1point 3acres bbs

18. clone graph
19. count and say(leetcode)

20. Divide without division
. visit for more.

21. Big Integer multiplication. (optimization required, how to do 8 digits*8 digits, etc).-google 1point3acres

. more info on
23.+1 Push all the zero's of a given array to the end of the array. In place only. Ex 1,2,0,4,0,0,8 becomes 1,2,4,8,0,0,0

24. You're given an array of integers(eg [3,4,7,1,2,9,8]) Find the index of values that satisfy A+B = C + D, where A,B,C & D are integers values in the array.

Eg: Given [3,4,7,1,2,9,8] array
The following.
3+7 = 1+ 9 satisfies A+B=C+D
so print (0,2,3,5)

-google 1point3acres
25. Find intersection of 2 sorted arrays.

. visit for more.





 楼主| NeptuneFrank 发表于 2015-10-19 03:36:05 | 显示全部楼层
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