47920_0_22967.cpp: In function `int main()':
47920_0_22967.cpp:7: error: `max' undeclared (first use this function)
47920_0_22967.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
47920_0_22967.cpp:16: error: `c1' undeclared (first use this function)
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