285338_0_25790.cpp: In function `int main()':
285338_0_25790.cpp:6: error: `cin' undeclared (first use this function)
285338_0_25790.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
285338_0_25790.cpp:15: error: `sqrt' undeclared (first use this function)
285338_0_25790.cpp:19: error: `cout' undeclared (first use this function)
285338_0_25790.cpp:19: error: `endl' undeclared (first use this function)
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