Compilare: user.cpp: In function ‘void Precalc()’: user.cpp:31:17: warning: unused variable ‘y0’ [-Wunused-variable] int y0=p1.second; ^ user.cpp: In function ‘int main()’: user.cpp:54:25: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] int dr=segm[z].size()-1; ^ user.cpp:127:13: note: ‘sol’ was declared here int sol; ^