class LRU:
    def __init__(self, capacity):
        self.capacity = capacity
        self.cache = {}
        self.order = []

    def refer(self, page):
        if page not in self.cache:
            if len(self.cache) >= self.capacity:
                lru_page = self.order.pop(0)  # Remove least recently used page
                del self.cache[lru_page]
        else:
            self.order.remove(page)  # Remove page to update its order
        self.cache[page] = True
        self.order.append(page)

    def display(self):
        print("Current Pages in Memory (LRU):", list(self.cache.keys()))

# Simulate LRU
def lru_simulation(pages, capacity):
    lru = LRU(capacity)
    for page in pages:
        lru.refer(page)
        lru.display()

# Example Pages and Capacity
pages = [7, 0, 1, 2, 0, 3, 0, 4]
capacity = 3
print("LRU Page Replacement Simulation:")
lru_simulation(pages, capacity)