Compilare: main.cpp: In function 'void solve()': main.cpp:91:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int index = 0; index < poz[0].size(); index++) ~~~~~~^~~~~~~~~~~~~~~ main.cpp:105:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int index = 0; index < poz[unlock].size(); index++) ~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp:119:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(depth[get_father(to1d(poz[0][0]))] == poz[0].size() + accesed && accesed > ((bool)poz[unlock].size())) {nr_unlock++;} ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~