View Compilation Error

0_0_1255455_22675.cpp: In function `int solve()':
0_0_1255455_22675.cpp:51: error: expected `;' before "int"
0_0_1255455_22675.cpp:52: error: `next' undeclared (first use this function)
0_0_1255455_22675.cpp:52: error: (Each undeclared identifier is reported only once for each function it appears in.)