출처 | https://www.acmicpc.net/step/7
str_bakset = []
str_bakset = input()
a = int(input())
print(str_bakset[a-1])
list_a = []
list_a = str(input())
print(len(list_a))
x = int(input())
for i in range(x):
a = str(input())
print(a[0]+a[-1])
n = input()
nums = input()
total = 0
for i in nums:
total += int(i)
print(total)
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