0_0_11662700_17210.cpp: In function `void init()':
0_0_11662700_17210.cpp:15: error: `vis' undeclared (first use this function)
0_0_11662700_17210.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11662700_17210.cpp: In function `int main()':
0_0_11662700_17210.cpp:65: error: `vis' undeclared (first use this function)
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