Help me in solving MAXSCORE7 problem

help
,
1

My issue

include <bits/stdc++.h>
using namespace std;

int main() {
// your code goes here
int n,t;
cin>>t;
while(t–){
cin>>n;
int a[n];
for(int i=0;i<n;i++){
cin>>a[i];
}
int s=0;
for(int i=n-1;i>0;i-=2){
s+=abs(a[i]-a[i-1]);
}
// cout<<abs(a[0]-a[1])<<endl;
cout<<s<<endl;

}

}
what’s going wrong with my code?

My code

#include <bits/stdc++.h>
using namespace std;

int main() {
	// your code goes here
	int n,t;
	cin>>t;
	while(t--){
	    cin>>n;
	    int a[n];
	    for(int i=0;i<n;i++){
	        cin>>a[i];
	    }
	    int s=0;
	    for(int i=n-1;i>0;i-=2){
	        s+=abs(a[i]-a[i-1]);
	    }
        // cout<<abs(a[0]-a[1])<<endl;
	    cout<<s<<endl;

	}

}

Problem Link: Maximum Score Practice Coding Problem - CodeChef

2

@jayakumari005
plzz refer my c++ code

#include <iostream>
using namespace std;

int main() {
	// your code goes here
	int t;
	cin>>t;
	while(t--)
	{
	    int n;
	    cin>>n;
	    int a[n];
	    int cnt=0;
	    for(int i=0;i<n;i++)
	    {
	        cin>>a[i];
	        if(a[i]==1)
	        cnt++;
	    }
	    cout<<min(cnt,(n-cnt))<<endl;
	}
	return 0;
}