203957_0_83.cpp: In function `int main()':
203957_0_83.cpp:34: error: `u' undeclared (first use this function)
203957_0_83.cpp:34: error: (Each undeclared identifier is reported only once for each function it appears in.)
203957_0_83.cpp:35: error: `v' undeclared (first use this function)
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