0_0_4276447_790.cpp: In function `int main()':
0_0_4276447_790.cpp:5: error: `cin' undeclared (first use this function)
0_0_4276447_790.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4276447_790.cpp:5: error: `cout' undeclared (first use this function)
0_0_4276447_790.cpp:5: error: `2' cannot be used as a function
0_0_4276447_790.cpp:5: error: `endl' undeclared (first use this function)
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