0_0_2817552_18805.cpp: In function `int main()':
0_0_2817552_18805.cpp:21: error: `doule' undeclared (first use this function)
0_0_2817552_18805.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2817552_18805.cpp:21: error: `n1' cannot be used as a function
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