One of the testcases is not succeeding in this code

#1

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

void next_greater(vectora,int n){
vector v;
stack s;
s.push(-1);

for(int i = n -1; i>= 0; i--){
	while(s.top() <= a[i] && s.top() != -1){
		s.pop();
	}
	v.push_back(s.top());
	s.push(a[i]);
}

for(int i = n-1; i>=0; i--){
	cout << v[i] << " ";
}

}

int main() {
int n;
cin >> n;
vectora;
for( int i = 0; i <n; i++){
int no;
cin >> no;
a.push_back(no);
}
next_greater(a,n);
return 0;
}

#2

hi @akki56756_bab14f919dbad123, please share your code here : https://ide.codingblocks.com/

#3

@akki56756_bab14f919dbad123,
its a circular array
for input :
4
8 2 3 6
ans is -1 3 6 8 but your code says -1 3 6 -1 as its circular so next greater of 6 will be 8

#4

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