0_0_8324748_31001.cpp:2: error: `main' must return `int'
0_0_8324748_31001.cpp: In function `int main(...)':
0_0_8324748_31001.cpp:4: error: `n1' undeclared (first use this function)
0_0_8324748_31001.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8324748_31001.cpp:4: error: `n2' undeclared (first use this function)
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