Compilare: main.cpp: In function 'void view_stack()': main.cpp:39:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < players.size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:44:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < players.size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:49:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < roata.size(); i++) ~~^~~~~~~~~~~~~~ main.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < roata.size(); i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int update_players(int)': main.cpp:63:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < roata.size(); i++) ~~^~~~~~~~~~~~~~ main.cpp:66:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (roata[i].rotiri == 0 && current_exited <= (players.size() - 2)) ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:79:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (current_exited == (players.size() - 1)) ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:83:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < roata.size(); j++) ~~^~~~~~~~~~~~~~ main.cpp:89:20: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null] return NULL; ^~~~ main.cpp:62:25: warning: variable 'x' set but not used [-Wunused-but-set-variable] int min = 10000000, x = 0; ^