oj python超时，求优化方法…
题目如图
代码如下
num0 = eval(input())

num1 = dict()

for I in range(num0):

try:

num2 = int(input())

num1[num2] += 1

except:

num1[num2] = 1

for I in sorted(num1.keys()):

print("{} {}".format(I, num1[I]))