Hi ,
These are my two submissions of Video Game problem in ZCO :
Push back , SIGABRT : CodeChef: Practical coding for everyone
No Push back , No SIGABRT 
: CodeChef: Practical coding for everyone
Can someone pls tell me why this happens ?
Pls dont downvote the post , i am newbie here , it will be really demotivating for me
Pls dont downvote
Thankyouu
This answer by admin explains why you get a SIGABRT error.
Also, it looks like you get WA with your code. You can learn from mine:
#include <iostream>
#include <vector>
using namespace std;
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
int n, h;
cin >> n >> h;
vector <int> heights;
heights.resize(n);
for (int i = 0; i < n; ++i)
{
cin >> heights[i];
}
vector <int> queries;
queries.resize(0);
int q = 1;
while (q != 0)
{
cin >> q;
queries.push_back(q);
}
int current = 0;
bool hasBox = false;
for (int i = 0; i < queries.size(); ++i)
{
if (queries[i] == 1)
{
if (current == 0)
{
;
} else {
current--;
}
} else if (queries[i] == 2)
{
if (current == (n - 1))
{
;
} else {
current++;
}
} else if (queries[i] == 3) {
if (hasBox == true || heights[current] == 0)
{
;
} else
{
heights[current]--;
hasBox = true;
}
} else if (queries[i] == 4) {
if (hasBox == false || heights[current] == h)
{
;
} else
{
heights[current]++;
hasBox = false;
}
} else {
break;
}
}
for (int i = 0; i < n; ++i)
{
cout << heights[i] << " ";
}
}
P.S. I wrote this code a long time ago so I use a lot of noob practices (like only using a semi-colon in a line 
) .
Hope you understand.
Saw that , didnt understand why i got SIGABRT
Can you pls explain ?
Thanks
Try initializing your o vector with size 0.
Tried it but no luck
a[i]--;
This is what’s causing the crash in the push_back version, though I’m not sure (yet) why it’s not crashing in the non-push_back version.
Edit:
Oh, I see - in the non-push_back version, you’re only reading in one instruction, so it doesn’t get to the instruction that causes the crash:
cin >> o[cnt];
cnt++;
if(o[cnt] == 0) break; // o[cnt] == 0 will always be true.
Then what to replace ?
Think about it some more. What do you do in the o[i] == 4 case? Why are you doing it differently for o[i] == 3?
wait a minute…we can downvote a post?!
Nope 
I dont know
I am new to codechef
yeah same…started last week or something 
Komedy Achived 
