Compilare: main.cpp: In function 'void Read()': main.cpp:45:7: warning: unused variable 'aux_x' [-Wunused-variable] int aux_x, aux_y; ^~~~~ main.cpp:45:14: warning: unused variable 'aux_y' [-Wunused-variable] int aux_x, aux_y; ^~~~~ main.cpp: In function 'double Arie()': main.cpp:78:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 1; i < St.size() - 1; ++i ) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void Do()': main.cpp:91:7: warning: 'p0' may be used uninitialized in this function [-Wmaybe-uninitialized] int p0; ^~