493905_0_0_5123.cpp:2: error: ISO C++ forbids declaration of `n' with no type
493905_0_0_5123.cpp: In function `int n()':
493905_0_0_5123.cpp:4: error: `scanf' undeclared (first use this function)
493905_0_0_5123.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
493905_0_0_5123.cpp:4: error: `EOF' undeclared (first use this function)
493905_0_0_5123.cpp:11: error: `printf' undeclared (first use this function)
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