Questions tagged [tideman]

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PSET3 Tideman - What to do with the lock_pairs function?

Can someone please help me with the lock_pairs section of the problem? The lock_pairs function is killing me. I get that you have to compare the pairs to each other and then return false or true in ...
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I do not understand what is happening in this line of code from pset3 tideman

// Update preferences given one voter's ranks void record_preferences(int ranks[]) { // TODO for (int i = 0; i < candidate_count; i++) { for (int j = i + 1; j < ...
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Need a bit of help in lock_pairs function of tidema(Pset3)

Here's my code for lock pairs- bool check_cycle(int start, int end) { if (end == start) { return false; } for (int i = 0; i < candidate_count; i++) { if (locked[...
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30 views

Passing arrays into function in tideman

I've created a solution to week 3's tideman problem which is entirely logically correct. Unfortunately, I had to dodge the standard solution by commenting out parts of a function and altering its ...
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pset3, tideman, cs50 2021

I worked with pset3 and I think there are nothing wrong with my code, but check 50 says it has 2 problems on my code. 1.:( lock_pairs skips final pair if it creates cycle 2.:( lock_pairs skips middle ...
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2answers
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Can't determine the problem with my tideman program - check50 fails at lock_pairs function, says I didn't correctly lock all non-cyclical pairs

My program for the tideman problem in pset3 passes all check50 checks except for :( lock_pairs skips final pair if it creates cycle lock_pairs did not correctly lock all non-cyclical pairs Here ...
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CS50 Tideman lock_pairs function

I am now in tideman and every function seems to work fine but I've been stuck on lock_pairs. I have come up with this solution and when I try to simulate an election it seems to run fine and produces ...
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1answer
33 views

pset 3 tideman print winner does not exist despite being declared

I have such a strange behavior here in pset 3, tideman. I am doing the print_winner function because check50 says everything else is fine, but when i run the program it looks like print_winner does ...
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49 views

Tideman error: :( lock_pairs skips final pair if it creates cycle

It would be amazing if someone had the time to look through my code for the Tideman exercise :D I get the following error: :( lock_pairs skips final pair if it creates cycle lock_pairs did not ...
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Sort_pairs fails check50 tideman

My sort_pairs function fails the check50 **:( sort_pairs sorts pairs of candidates by margin of victory ** test however it passes the usage case given on the CS50 website. In the pair type def, I ...
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1answer
109 views

PSET 3 - Tideman: Lock Pairs Function

So basically I've got ': )' on everything except : ( lock_pairs skips final pair if it creates cycle Cause lock_pairs did not correctly lock all non-cyclical pairs : ( lock_pairs skips middle pair if ...
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1answer
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Pset3 Tideman: Why is my sort_pairs function not working?

I'm green on all the criteria before sort_pair. Here's my code so far: // Sort pairs in decreasing order by strength of victory void sort_pairs(void) { // TODO // Create array of strengths of ...
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CS50 Tideman : Sort Pairs problem - check50 automatic test fails, but output seems correct

Good morning guys, I am working on implementation of tideman. Particulary at implementing sort_pairs function. I have written it and tested - and the output seems sorted in a proper way. However - ...
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186 views

PSET3 Tideman: Lock_Pairs Help

I've been stuck on this function of the PSET for a couple of days now. I have met every requirement in check50 except for the one that says, ":( lock_pairs skips final pair if it creates a cycle; ...
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116 views

Tideman - :( lock_pairs skips final pair if it creates cycle

I have a problem in my Tideman program, it get the error ":( lock_pairs skips final pair if it creates cycle". Can anyone help me figure out what's going on? #include <cs50.h> #...
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46 views

Tideman : “sort_array” rejected by check50

I am working on Tideman today, and I am stuck on the "sort_array" function. The output my function produces is the one I expect but he 'check50' send me this ":( sort_pairs sorts pairs ...
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56 views

Tideman: invalid operands to binary expression ('void' > and 'int')

I'm getting the following error on creating the lock-pair function: tideman.c:259:36: error: invalid operands to binary expression ('void' and 'int') if (check_winner(pairs[i]) == -1) Can someone ...
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1answer
31 views

Segmentation fault tideman swap function

I'm getting segmentation fault due to my swap function I believe - but can't figure out where it comes from. #include <cs50.h> #include <stdio.h> #include <string.h> // Max number ...
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99 views

pset3 tideman lock_pairs: why does “lock_pairs locks all pairs when no cycles” fail?

My code fails at check50 but I can't understand why. It that seems my code actually finds cycles, but also produces false-positives (I guess). check50 output for the lock_pairs function: :( lock_pairs ...
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39 views

PSET3 Tideman Sorting Check50 Error

What's the difference between these two codes? Why does the first return me no error from check50 while the second one does? void sort_pairs(void) { int max; for (int i = 0; i < pair_count; ...
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62 views

pset3 tideman cs502020 locked pairs error

I am new to coding and I am trying to solve the locked pairs part of the Tideman problem. Currently, I am receiving the following two errors: :) lock_pairs locks all pairs when no cycles :( lock_pairs ...
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cs50 pset3 print winner function

Im strugling with print_winner function in Tideman election program. In my opinion function workes fine. It prints the candidate which has all false values in column under his name (number) in locked ...
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1answer
38 views

Tideman sort_pairs seems correct but check50 tells me it isn't

Here is the code for my pair sorting algorithm. void sort_pairs(void) { int sorted_pairs_added = 0; for (int i = voter_count; i > 0; i += -1) { for (int j = 0; j < pair_count;...
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Converting Tideman Cycle test from Python to C

I have written a program in python that (as far as I know) successfully determines whether the locked matrix has a loop in it. However I am having a bit of trouble converting it to C. I am getting an ...
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help with pset3 tideman lock_pairs function

This function is a recursive function, that lock_pairs is using to understand if a pair will create a cycle: bool create_cycle(int win_idx, int orig_idx) { if (win_idx == orig_idx) // if it's not ...
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PSET3 Tideman: Help with lock_pairs function

how's it going? I'm now working on Tideman but I'm now having a hard time why my code does not satisfy all the condition, only the first one: :) lock_pairs locks all pairs when no cycles These two ...
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I'm STUCK for a good while in pset3 Tideman last 3 functions :(

I'm mostly concerned about the sort_pairs() function atm, but i'm willing to receive answers regarding the whole code. I can't really see what's wrong with the way i coded it in general, but mostly ...
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tideman sort pairs not working

dont know why my function isn't working, i suspect the while loop triggers even when it shouldn't. void sort_pairs(void) { // TODO supair supairs[pair_count]; supair unSorted[pair_count]; ...
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1k views

How to swap elements in “struct” data type?

I am working on "tideman" from pset3 and stuck on sorting the data that i have in "struct" data type. Don't really know if it was supposed to be figured out on our own, but they ...
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CS50 tideman Lockpairs function (Doesn't skip the last pair?)

So in order to solve lockpairs function, I made a custom function that can detect a cycle (it would return true if it has a cycle, false if it doesn't). My custom functions logic is: Check each pair ...
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Could someone explain why this function for pset3/tideman isn't correct

So as seems to be the case with many people, I'm struggling a bit with tideman. My code scores full marks up until the point where the pairs become "locked." The code for my lock_pairs ...
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Tideman: linking pairs to candidates

and thanks for helping. I am confused with Tideman, and would love some enlightenment: I successfully sorted pairs, and can't figure out, in order to fill the bool locked, how to link the candidates ...
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62 views

lock_pairs skips final pair if it creates cycle

I have been working on the tideman problem from Problem Set 3. After multiple attempts, I have been able to pass all the required checks except one: "lock_pairs skips final pair if it creates ...
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49 views

Problem Set 3 - Tideman Lock Pairs

I am trying to solve the tideman problem for pset3. I have managed to get all parts of my code working apart from the the two parts which relate to checking whether cycles are created. :( lock_pairs ...
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43 views

Error in recursive cycle check function for pset3 tideman

I've implemented a recursive function to check for cycles and return a boolean based on if a cycle is found or not. Check50 only returns one error, and that is for "lock_pairs skips final pair if ...
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39 views

PSET 3 TIDEMAN Locked pairs Function

I am relatively new to the community so please forgive me should my question not be coherent enough. Ok so basically check 50 tells me that everything in my code is okay except for the locked pairs ...
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565 views

lock_pairs skips final pair if it creates cycle lock_pairs did not correctly lock all non-cyclical pairs

can anyone please help I got only one error which is:- lock_pairs skips final pair if it creates cycle lock_pairs did not correctly lock all non-cyclical pairs and this is my code bool hash_cycle(int ...
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29 views

Lock pairs and Recursivity

I've been trying to solve this pset since more than a month and don't want to give up... so this is the first time I'm coming to ask for help. Basically I separated in two parts the lock_pairs ...
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157 views

Can't get pset3/tideman's lock-pairs function to work

Before going to Python I thought I'd go back to some previous homework that I hadn't been able to solve - pset3/tideman. I've spent ages on this but I just can't seem to figure out the lock function. ...
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pset3 Tideman: checking for cycles

I made it so that if a losing candidate in any pair wins in another, a function checks whether there's the losing candidate in that pair wins in any other, and so forth. this here is the unlocks the ...
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111 views

My print_winner from pset3/tideman is doing everything right and still check50 says it's wrong

void print_winner(void) { bool looser; for (int i = 0; i < pair_count; i++) { looser = false; for (int j = 0; j < pair_count; j++) //checks if each winner ever lost ...
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378 views

Pset 3 Tideman lock pairs function

Help, i'm losing my mind. I'm not sure where i'm going wrong in this function, it gives me an error on every line of check50 after sort pairs. Can anybody shed any light? Thank you in advance! J // ...
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318 views

Logical flaw in Problem Set 3 - Tideman?

Whilst writing my code for Tideman in Problem Set 3, I had many problems with the lock pair function, as I am very new to coding. Some research I did online also showed that this question is ...
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51 views

sort_pairs function not working as per check50

This seems to be a common problem where the check50 program indicates a problem with the sort_pairs function. Here was my implementation of that function: int w; int l; int w1; int l1; for (int i=0; ...
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472 views

Please help about tideman lock_pair function!

// Lock pairs into the candidate graph in order, without creating cycles void lock_pairs(void) { for (int i = 0; i < pair_count; i++) { locked[pairs[i].winner][pairs[i].loser] = ...
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1answer
95 views

Program and debug50 different results

I'm trying to do pset3/tideman. My question is, why when I run program, I get different result (matrix[m]) than run with debug50? void lock_pairs(void) { for (int i = 0; i < pair_count; i++) ...
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239 views

Pset3 Tideman: lock_pairs skips middle pair if it creates a cycle

I'm having issues figuring out how to solve this problem without using recursion (I'm not sure how to solve things recursively). Its a program that determines the winner of a Tideman election and I'm ...
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117 views

pset3 tideman; can't pass check50 “lock_pairs skips final pair if it creates cycle”

I'm kind of confused about what the last pairs should be if it creates cycle. Like, if a->b, b->c, and the last pair is c->a, should I just skip it or turn it around, make it a->c? I tried both idea, ...
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What's in the bool function parenthesis?

hope everyone is staying safe. I just want to understand what's inside the parenthesis of the vote function in pset3 - Tideman: bool vote(int rank, string name, int ranks[]) What does it mean to ...
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p_set3 why does the int main clear the graph of locked in pairs?

hope everyone is staying safe. I am in week 3 and doing problem set # 3 - Tideman voting. In the main function it says the following: Why does it need to clear the graph of locked in pairs? (p.s. ...