View Compilation Error

0_0_38911889_17690.cpp: In function 'void solve()':
0_0_38911889_17690.cpp:75:28: error: 'dot' was not declared in this scope
   75 |                 if(abs(abs(dot(y-x,z-x))-dist(y,x)*dist(z,x))<=eps) continue;
      |                            ^~~
0_0_38911889_17690.cpp:75:42: error: 'dist' was not declared in this scope
   75 |                 if(abs(abs(dot(y-x,z-x))-dist(y,x)*dist(z,x))<=eps) continue;
      |                                          ^~~~