Not getting proper op

#include
using namespace std;

void merge(int arr[],int s,int e) {
int mid=(s+e)/2;

int i=s;
int k=s;
int j=mid+1;

int temp[100]={0};

while(i<=mid && j<=e) {
    if(arr[i]>arr[j]) {
        temp[k++]=arr[i++];
    }
    else {
        temp[k++]=arr[j++];
    }
}

while(i<=mid) {
    temp[k++]=arr[i++];
}

while(j<=e) {
    temp[k++]=arr[j++];
}

for(int i=s;i<=e;i++) {
    arr[i]=temp[i];
}

}

void mergeSort(int arr[],int s,int e) {
///0 or 1 element
if(s>=e) {
return;
}

///1st - divide
int mid=(s+e)/2;

///Recursively arrays (s to mid) (mid+1 to e)
mergeSort(arr,0,mid);
mergeSort(arr,mid+1,e);

///2nd - sort
merge(arr,0,e);   

}

int main() {
int n;
cin >> n;

int arr[100];
for(int i=0;i<n;i++) {
    cin >> arr[i];
}

mergeSort(arr,0,n-1);

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

return 0;

}

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