stack

C++/C/Java: Anagrams - from original string to target;

由 拟墨画扇 提交于 2019-12-03 00:50:17
I'm trying to solve this problem : http://uva.onlinejudge.org/external/7/732.html . For the given example, they give us the original word, for example TRIT and the target "anagramed" string, TIRT . Objective: We have to output all the valid sequences of 'i' and 'o' (push and pop's, respectively) which produce the target string from the source string. So, I was thinking of calculate all permutations of "i" and "o" , but cutting this cases: 1) if current permutation begins with an 'o', stop checking, since all the of the next permutations will begin with this pop command and popping something

Beginner's confusion about x86 stack

由 為{幸葍}努か 提交于 2019-12-03 00:42:51
First of all, I'd like to know if this model is an accurate representation of the stack "framing" process. I've been told that conceptually, the stack is like a Coke bottle. The sugar is at the bottom and you fill it up to the top. With this in mind, how does the Call tell the EIP register to "target" the called function if the EIP is in another bottle (it's in the code segment, not the stack segment)? I watched a video on YouTube saying that the "Code Segment of RAM" (the place where functions are kept) is the place where the EIP register is. Typically, a computer program uses four kinds of

Difference between - returning a 'local' char* from a function vs returning a 'local' int* from a function [duplicate]

由 懵懂的女人 提交于 2019-12-03 00:19:00
问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: Can a local variable’s memory be accessed outside its scope? Here is a simple code, where in 3 different functions [ localStrPtr, localIntPtr, localCharPtr] return a pointer to their local variables [string, integer, char] in their respective functions. CODE: #include <stdio.h> char* localStrPtr (char*); int* localIntPtr (int, int); char* localCharPtr (char); main() { int *pInt; char *pChar; printf( "localStrPtr

View activity stack in Android [closed]

由 烈酒焚心 提交于 2019-12-03 00:18:58
问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 6 years ago . Is it possible to view the activity stack in Android for debugging purposes? 回答1: To display the activity stack, run the following command : adb shell dumpsys activity activities 来源： https://stackoverflow.com

How to implement 3 stacks with one array?

由 邮差的信 提交于 2019-12-03 00:08:52
问题 Sometimes, I come across the following interview question: How to implement 3 stacks with one array ? Of course, any static allocation is not a solution. 回答1: Space (not time) efficient. You could: 1) Define two stacks beginning at the array endpoints and growing in opposite directions. 2) Define the third stack as starting in the middle and growing in any direction you want. 3) Redefine the Push op, so that when the operation is going to overwrite other stack, you shift the whole middle

stack overflow c++

由 拟墨画扇 提交于 2019-12-02 23:15:20
问题 So i', trying to solve a task. a already have code, but system outs, "stack overflow" i'm new in c++ and my english isn't good so i'm sorry for misunderstanding =) #include <iostream> using namespace std; int main (){ int n; int x; int k = 0; // счетчик для рабочего массива int a [200000]; scanf("%d\n",&n); for (int i = 0; i< n; ++i){ std::cin >> x; if (x > 0){ k++; a[k] = x; }else if(x == 0){ for (int q = 1; q <= k; ++q){ // копирование a[k+q] = a[q]; } k *= 2; }else{ printf("%d %d\n",a[k],k

The type Stack is not generic; it cannot be parameterized with arguments <Character>

由 梦想的初衷 提交于 2019-12-02 22:41:25
问题 I am trying to write a simple program to use stacks.It is giving me the error The type Stack is not generic; it cannot be parameterized with arguments import java.util.*; public class Stack { public static void main(String[] args) { Stack<Character> stack = new Stack<> (); s.push("Hello"); System.out.println(s); } } 回答1: Your class Stack is shadowing java.util.Stack . You could rename your class, or use the fully qualified class name like java.util.Stack<Character> stack = new java.util.Stack

How to debug Android ANR?

由 回眸只為那壹抹淺笑 提交于 2019-12-02 22:16:09
My Android app gets a lot of ANR reports lately in the Google Play console. Since this started to happen when I included Google Analytics in the app, I strongly suspect Analytics to cause it. Problem is that I know how to debug a crash using the stack trace. But I'm not sure about how to debug an ANR. I guess that an ANR means that the main thread is blocked somewhere. But how to know where it is blocked? See below one of the typical ANR I got lately. How to interpret it and start figuring out where does the app hangs? PS: Some of the classes / methods in the stacks look weird due to the usage

Difference between “call stack” and “thread stack”

由 孤者浪人 提交于 2019-12-02 20:58:57
Is there a semantic difference between the terms call stack and thread stack , in Java multithreading? Each thread has its own call stack, "call stack" and "thread stack" are the same thing. Calling it a "thread stack" just emphasizes that the call stack is specific to the thread. Bill Venners calls this the Java stack : When a new thread is launched, the Java virtual machine creates a new Java stack for the thread. As mentioned earlier, a Java stack stores a thread's state in discrete frames. The Java virtual machine only performs two operations directly on Java Stacks: it pushes and pops

ValueError: all the input arrays must have same number of dimensions . Stacking vectors

由 那年仲夏 提交于 2019-12-02 20:40:16
问题 l have three arrays to append. Here a sample of my vectors : V1=array([ 0.03317591, -0.01624349, -0.01151019]) V2=array([[ 0.06865846, -0.00223798], [-0.02872752, -0.00369226], [-0.02063454, -0.00231726]]) V3= array([[ 0.01160267, 0.12610824, -0.01634712, 0.01217519], [-0.00727594, -0.0501376 , -0.01641992, 0.00933081], [-0.05305551, 0.01195211, 0.04031831, -0.04476306]]) in order to append the three vectors and get one vector l did the following : new_v=np.hstack((V1,V2,V3)) l got the
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