400533_0_0_28487.cpp:2: error: `main' must return `int'
400533_0_0_28487.cpp: In function `int main(...)':
400533_0_0_28487.cpp:5: error: `scanf' undeclared (first use this function)
400533_0_0_28487.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
400533_0_0_28487.cpp:5: error: `EOF' undeclared (first use this function)
400533_0_0_28487.cpp:22: error: `printf' undeclared (first use this function)
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