View Compilation Error

0_0_3342034_179.cpp: In function `int solve()':
0_0_3342034_179.cpp:82: error: `queue' undeclared (first use this function)
0_0_3342034_179.cpp:82: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3342034_179.cpp:82: error: expected primary-expression before '>' token
0_0_3342034_179.cpp:82: error: `q1' undeclared (first use this function)