Compilare: user.cpp: In function ‘bool comparare(punct, punct)’: user.cpp:26:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return ((A.x<B.x) || (A.x==B.x) && (A.y<B.y)); ^ user.cpp: In function ‘int main()’: user.cpp:122:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<y.size(); i++) ^ user.cpp:123:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i+1; j<y.size() && j<=i+7; j++) ^