Help in ADACRA

i wrote a program for ada and crayons problen(ADACRA) and submitted it. I am new in here and it showed the β€˜!’ inside a red circle and showed error code SIGSEGV. can you please tell me what is the problem. here is my code:

#include<iostream>
using namespace std;
int main()
{
    char arr[50];
    int n;
    int crayon_U=0;
    int crayon_D=0;
    cin>>n;
    for(int i=0;i<n;i++)
    {
        cin>>arr[i];
    }
    for(int i=0;i<n;i++)
    {
        if(arr[i]!=arr[i+1]&&arr[i]=='U')
            crayon_D++;
        else if(arr[i]!=arr[i+1]&&arr[i]=='D')
            crayon_U++;
    }
    cout<<min(crayon_D,crayon_U);
    return 0;
}

for(int i=0;i<n;i++)
{
cin>>arr[i];
}

Remove this. C++ has a separate data type β€œstrings” to handle strings. Also, you are NOT given the length of string. You will need to find it using β€œ.length()” function.

Also, your code does things for only 1 string. While you are expected to print output for T strings. All you have to do is-

//enter code here.
int t;
cin>>t;
while(t--)
{
//solve question in this loop
}

You can look at my code for reference, although i did the problem in a long way :stuck_out_tongue: CodeChef: Practical coding for everyone

In the problem statement, they never give you n which you are scanning. So the value that your get in n is actually value of T in the problem statement. Then you are scanning characters n times, which gives the problem.
Use std::string to scan the string, and then get its length by using string_name.length().
Or read the problem statement carefully and implement it again. :slight_smile:

#include
using namespace std;
int main()
{
int t;
cin>>t;
for(int x=0;x<t;x++)
{
string s;
cin>>s;
int u=0,d=0;
for(int m=0;s[m]!=’\0’;m++)
{
if(s[m]==β€˜U’)
u++;
else
d++;
}
int count=0;
if(u>d)
{
for(int i=0;s[i]!=’\0’:wink:
{
if(s[i]==β€˜D’)
{
while(s[i]==β€˜D’)
i++;
count++;
i++;
}
else
i++;
}
}
else
{
for(int j=0;s[j]!=’\0’:wink:
{
if(s[j]==β€˜U’)
{
while(s[j]==β€˜U’)
j++;
count++;
j++;
}
else
j++;
}
}
cout<<count<<endl;
}
return 0;
}
Unable to find bug in my code as it runs for all the test cases perfectly!

ty for help…i now understand it