import sys def main(): lines = sys.stdin.read().splitlines() n = int(lines[0]) stack = [] for line in lines[1:n+1]: parts = line.strip().split() op = parts [0] if op == 'push': x = int(parts[1]) stack.append(x) elif op == 'pop': if not stack: print("Empty") else: stack.pop() elif op == 'qu...
