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#include <iostream>
using namespace std;
struct stack
{
int inf;
stack *next;
};
void push(stack *&h, int x)
{
stack *r = new stack;
r->inf = x;
r->next = h;
h = r;
}
int pop(stack *&h)
{
int i = h->inf;
stack *r = h;
h = h->next;
delete r;
return i;
}
void reverse(stack *&h)
{
stack *head1 = NULL;
while (h)
push(head1, pop(h));
h = head1;
}
stack *result(stack *&h)
{
stack *tmp = NULL;
stack *res = NULL;
while (h)
{
int c;
c = pop(h);
if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u')
push(tmp, c);
else
push(res, c);
}
reverse(res);
while (tmp)
{
int elem;
elem = pop(tmp);
push(res, elem);
}
return res;
}
int main()
{
int n;
cout << "n = ";
cin >> n;
stack *head = NULL;
char x;
for (int i = 0; i < n; i++)
{
cin >> x;
push(head, int(x));
}
reverse(head);
stack *res = result(head);
while (res)
cout << char(pop(res)) << " ";
cout << endl;
return 0;
}
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