Compilare: main.cpp: In function 'void add(int)': main.cpp:47:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[value].size(); i++) ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int query(int&, int&, int&, int&)': main.cpp:116:6: warning: unused variable 'med' [-Wunused-variable] int med; ^~~ main.cpp: In function 'bool verif(int, int, int, int, int, int)': main.cpp:88:28: warning: 'ending' may be used uninitialized in this function [-Wmaybe-uninitialized] for (int i = start + 1; i <= ending; i++) ~~^~~~~~~~~ main.cpp: In function 'int query(int&, int&, int&, int&)': main.cpp:126:3: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized] if (verif(med,start,xi,yi,xf,yf)) ^~