225993_0_18756.cpp: In function `int main()':
225993_0_18756.cpp:7: error: `cin' undeclared (first use this function)
225993_0_18756.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
225993_0_18756.cpp:19: error: `fabs' undeclared (first use this function)
225993_0_18756.cpp:20: error: `cout' undeclared (first use this function)
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