q = [] T = int(input()) for _ in range(T): a = list(map(int, input().split())) op = a[0] if op == 1: x = a[1] q.append(x) elif op == 2: q.pop() elif op == 3: i = a[1] print(q[i]) elif op == 4: idx = a[1] x = a[2] q.insert(idx + 1, x) elif op == 5: q.sort() elif op == 6: q.sort(reverse = True) elif op == 7: print(len(q)) else: print(*q)
简单模拟