Compilare: main.cpp: In function 'bool cmp_punct(punct, punct)': main.cpp:38:39: warning: suggest parentheses around '&&' within '||' [-Wparentheses] return (_x.x < _y.x || _x.x == _y.x && _x.y < _y.y); ~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'void vecini()': main.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < puncte_pe_linie[x].size(); ++i) { ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:47:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < puncte_pe_linie[x].size() - 1) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:56:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < puncte_pe_coloana[x].size(); ++i) { ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:57:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < puncte_pe_coloana[x].size() - 1) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~