Leaders in an array

#include <stdio.h>
void rev(int arr[], int start, int end) 
{ 
    while (start < end) 
    { 
        int temp = arr[start];  
        arr[start] = arr[end]; 
        arr[end] = temp; 
        start++; 
        end--; 
    }  
}      
int main() {
    int i,j,t,n,maxi,temp;
	scanf("%d",&t);
	for(j=0;j<t;j++){
	    scanf("%d",&n);
	    int a[n],max[n],k=0;
	    for(i=0;i<n;i++){
	        scanf("%d",&a[i]);
        }
        maxi=a[n-1];
        for(i=n-2;i>=0;i--){
            if(maxi<=a[i]){
                k++;
                max[k]=a[i];
                maxi=a[i];
            }
        }
        rev(max,0,k);
        for(i=0;i<k;i++){
	        printf("%d ",max[i]);
        }
	    printf("%d ",a[n-1]);
        printf("\n");
}    
	return 0;
}