0_0_11705160_7357.cpp: In function `void input()':
0_0_11705160_7357.cpp:31: error: `cam' undeclared (first use this function)
0_0_11705160_7357.cpp:31: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11705160_7357.cpp:38: error: `field' undeclared (first use this function)
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