269692_0_11002.cpp: In function `int main()':
269692_0_11002.cpp:12: error: no match for 'operator!=' in 'str != '\n''
269692_0_11002.cpp:14: error: no match for 'operator<=' in 'str <= '9''
269692_0_11002.cpp:14: error: no match for 'operator>=' in 'str >= '0''
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