This was simple. Just everything use current[j] + = current[j-1]. But leave the first one is "1". Then add another ' 1 ' to end.1 classSolution {2 Public:3vectorint> > Generate (intnumrows) {4vectorint> >result;5 if(NumRows = =0)returnresult;6vectorint> Current (1,1);7 Result.push_back (current);8 for(inti =2; I ) {9 for(intj = current.size ()-1; J >0; j--) {TenCURRENT[J] + = current[j-1]; One } ACurrent.push_back (1); - Result.push_back (current); -
such a function, such as fprintf (), are variable and variable, the caller cannot know the length of the parameter in advance, and the cleanup operation afterwards cannot proceed normally, therefore, we can only use _ cdecl in this case. Here we have a conclusion that if yourProgramVariable parameters are not involved, it is best to use the _ stdcall keyword.
In addition:_ CdeclThe parameter is pushed from right to left to the stack. The caller pushes the parameter to the stack. For a "C" fun
Similar to Pascal's triangle, there is no need to record everything, but to give a line number and return that row of data. For example:For example, given k = 3,Return [1,3,3,1] .So return [1] to 0.The topic requires O (k) space, which is the constant space in addition to the space to be returned.Then use a TMP to save the value of the i-1 in the previous matrix, and then update it according to the addition.classSolution { Public: Vectorint> GetRow (intRowIndex) {Vectorint>ans; Ans.push_back (1)
Random functions are the most basic, and we can use random functions to test whether our programs will time out during the race.Random functions can also make some big data for two programs to shoot between (one is a burst search, one is a positive solution).Of course, we can also use random function to test their own program, the random function is necessary when the question.Here's a look at how random functions are written (pseudo-code):1. First we want to put randomly generated data into a t
return tmpLarge.push_back(tmp);The price is equal totmpLarge.push_back(tmp);return tmpLarge;Because the push_back () return value type is void, the latter returns the type of Tmplarge.The code is as follows:classSolution { Public: vectorvectorint>>GenerateintNumRows) {if(NumRows = =0) { vectorvectorint>>Tmplarge;returnTmplarge; }if(NumRows = =1) { vectorint>tmp vectorvectorint>>Tmplarge; Tmp.push_back (1);//"Return Tmplarge.push_back (TMP);" is ErrorTmplarge.push_back (TMP);returnTmplarge; } vec
The main topic: each small representative can walk to the right or down a few steps, ask from the top left up to the right down the total number of ways to go.DP[I][J] How many of these squares are stored.#include HDU 1208 Pascal ' s Travels (memory Search)
First, the topic1, examining 2. AnalysisEnter an integer n to return n rows of the Yang Hui Triangle.Second, the answer1, Ideas:Method One,Computes a row of the Yang Hui Triangle directly using a single loop. The second loop uses the List to store n rows of the Yang Hui Triangle. PublicListintnumrows) {ListNewArraylist(); if(NumRows = = 0) returnresultlist; Else if(NumRows = = 1) {Resultlist.add (Arrays.aslist (1)); returnresultlist; } resultlist.add (Arrays.aslist (1)); Resultli
Given an indexK, ReturnKTh row of the Pascal's triangle.
For example, givenK= 3,
Return [1, 3, 3].
Note:
Cocould you optimize your algorithm to use onlyO(K) Extra space?
Thought: For each row of the Pascal triangle, the element at both ends is 1, and the intermediate element curr [I] = Prev [I-1] + Prev [I]. To obtain the k-th row, use iterative solution. At the same time, use the symmetry of each row to optimize the inner loop.
1 class Solution { 2
Monopoly mud Pascal source code chaobs adapted from Baidu's work
The source code is not original in chaobs, but the source code is still indicated during reprinting.
It is estimated that no child will know Mud after the 90 s.
Program wxtw;Uses CRT;TypeZbdy = recordX, Y: integer; end;VaR N, I, X, Y, T, SJS: integer; Ml: Char;ZB: array [1 .. 12] of zbdy;BeginRandomize;SJS: = random (3 );ZB [1]. X: = 15; ZB [1]. Y: = 15;Clrscr;Gotoxy (zb [1]. X, ZB [1].
with. } End;
The constructor is defined as follows:
Constructor tmyrect. create; begin inherited create; left: = 0; top: = 0; Right: = 0; bottom: = 0; {There is no need to initialize each field to 0, because when a class object is created, all fields are automatically initialized to 0} end; constructor tmyrect. createval (Aleft, atop, aright, abottom: integer); begin inherited create; left: = Aleft; top: = atop; Right: = aright; bottom: = abottom; end;
Note
When a class object is created, al
// The following code is compiled on vc2005
//
# Include "stdafx. H"
/*-----------------------------------------------The following numerical mode is called Pascal's triangle)11 11 2 11 3 3 11 4 6 4 1...The number on the triangle boundary is 1, and each number inside is the sum of the two numbers located above it.Write a process and use recursive algorithms to calculate the Pascal triangle.
// In China, which can be called the "Yang Hui triangle or Ji
LeetCode118: Pascal #39; s Triangle
Given numRows, generate the first numRows of Pascal's triangle.
For example, given numRows = 5,Return
[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1]]
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// Solution: use an intermediate vector to save the number class Solution {public: vector on each layer
> Generate (int numRows) {vector
> Ans; for (int I = 0; I
Cur; if (I = 0) cur. pu
https://oj.leetcode.com/problems/pascals-triangle/http://blog.csdn.net/linhuanmars/article/details/23311527Publicclasssolution{publiclist[leetcode]118 Pascal ' s Triangle
Given an index K, return the kth row of the Pascal ' s triangle.For example, given k = 3,Return [1,3,3,1] .Note:Could optimize your algorithm to use only O(k) extra space?Same as Pascal's Triangle just return the result is not the same as a slight modification can be the code as follows:public class Solution {public listPascal ' s Triangle II
Given an indexK, ReturnKThRow of the Pascal's triangle. For example, givenK= 3,Return[1, 3, 3]. Note: Cocould you optimize your algorithm to use onlyO(K) Extra space? Original question link: https://oj.leetcode.com/problems/pascals-triangle-ii/ Question: given an index K, return the K row of the Pascal triangle. Idea: This question can be solved using the method in the previous question. It is a general term formula, and it has nothing to do with
A whole-person Pascal AppletAfter running, there will be a lot of garbage in the hard disk. Of course, this is a better way!VaR A, B, C, D: Char;BeginFor a: = '0' to '9' doFor B: = '0' to '9' doFor C: = '0' to '9' doFor D: = '0' to '9' doBeginAssign (output, 'c: \ '%a% B %c%d%'.txt '); rewrite (output );Write (1 );Close (output );Assign (output, 'd: \ '{a} B }c}d}'.txt '); rewrite (output );Write (1 );Close (output );Assign (output, 'e: \ '%a% B %c%d%
Tags: leetcode algorithm Pascal Yang Hui triangle
In the Yang Hui triangle, calculate the first n rows and the nth rows respectively.
[N rows before the Yang Hui triangle]
Given numrows, generate the first numrows of Pascal's triangle.
For example, given numrows = 5,Return
[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1]]Basic questions: view the Code directly and pay attention to the boundary.
public class Solution { public List
[Line N o
Implement a basic calculator to evaluate a simple expression string.The expression string contains only non-negative integers,,, + - * , / operators and empty spaces . The integer division should truncate toward zero.Assume that the given expression was always valid.Some Examples:"3+2*2" = 7 "3/2" = 1 "3+5/2" = 5Note: don't use the eval built-in library function.Credits:Special thanks to @ts for adding this problem and creating all test cases.[Leetc
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