View Compilation Error

0_0_1680792_3703.cpp:23: error: `ing' does not name a type
0_0_1680792_3703.cpp: In function `int main()':
0_0_1680792_3703.cpp:63: error: `solve' undeclared (first use this function)
0_0_1680792_3703.cpp:63: error: (Each undeclared identifier is reported only once for each function it appears in.)