题解 | 多组_带空格的字符串_T组形式
a = int(input()) for i in range(a): b = int(input()) c = input() for j in range(b-1, -1, -1): if c[j] != ' ': print(c[j], end='') print()
a = int(input()) for i in range(a): b = int(input()) c = input() for j in range(b-1, -1, -1): if c[j] != ' ': print(c[j], end='') print()
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