0_0_12214330_18726.cpp: In function `void init()':
0_0_12214330_18726.cpp:24: error: `top' undeclared (first use this function)
0_0_12214330_18726.cpp:24: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12214330_18726.cpp: At global scope:
0_0_12214330_18726.cpp:32: error: `int top' used prior to declaration
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