wtf

int main
{
    struct stack{
        int top;
        int elementy[10];
    };

    int top(struct stack S);
    int push(10, struct stack* S);
    int push(-10, struct stack* S);
    int top(struct stack S);
    int pop(struct stack* S);
    int top(struct stack S);
    int push(20, struct stack* S);
    int push(30, struct stack* S);
    int pop(struct stack* S);
    int top(struct stack S);
    int pop(struct stack* S);
    int pop(struct stack* S);
    int top(struct stack S);
    int pop(struct stack* S);
    int pop(struct stack* S);
    int pop(struct stack* S);
    int top(struct stack S);

    return 0;
}