View Compilation Error

0_0_12348696_10640.cpp: In function `long long int solve()':
0_0_12348696_10640.cpp:74: error: `A' undeclared (first use this function)
0_0_12348696_10640.cpp:74: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12348696_10640.cpp:74: error: `Seg' undeclared (first use this function)