Why my code is not working

#1

Example is running well but other cases are failed
#include<bits/stdc++.h>
#define ll long long int
using namespace std;
int main()
{
ll m,n;
cin>>m>>n;
ll ar[m][n];
for(ll i=0;i<m;i++)
{
for(ll j=0;j<n;j++)
{
cin>>ar[i][j];
}
}
for(ll i=0;i<m;i++)
{
for(ll j=0;j<n;j++)
{
cout<<ar[j][i]<<" “;
}
cout<<”\n";
}
}

#2

@the.shubham.sri
hello shubham,
please share ur code using coding blocks ide

#3

@the.shubham.sri
you are printing columnwise but you need to print it in wave manner i.e
first column (from first row to last row)
second column ( from last row to first row)
third coulmn ( from first row to last row)
fourth column ( from last row to first row)
so on.
check below example

image

#4

@the.shubham.sri
hello shubham,
if ur doubt is resolved then pls mark it as resolved

#5

#include < iostream>
using namespace std;
int main() {
int n,m,i,j;
cin>>n>>m;
int arr[n][m];
for(i=0;i<n;i++)
for(j=0;j<m;j++)cin>>arr[i][j];
for(i=0;i<m;i++)
{
if(i%2)
{
for(j=n-1;j>=0;j–)
cout<<arr[j][i]<<", “;
}
else
for(j=0;j<n;j++)
cout<<arr[j][i]<<”, ";
}
cout<<“END”;
return 0;
}

#6

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