View Compilation Error

0_0_36879228_9781.cpp: In function 'void solve()':
0_0_36879228_9781.cpp:16:39: error: 'ye' was not declared in this scope
  else if (ya > y0 && yb > y0&&yb<=y2&&ye<y0)
                                       ^
0_0_36879228_9781.cpp:18:5: error: redeclaration of 'll ye'
  ll ye = a * (2 * x1 - x0) * (2 * x1 - x0) + b * (2 * x1 - x0) + c;
     ^
0_0_36879228_9781.cpp:16:39: note: '<typeprefixerror>ye' previously declared here
  else if (ya > y0 && yb > y0&&yb<=y2&&ye<y0)
                                       ^