Compilare: main.cpp: In function 'void backT(int)': main.cpp:70:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<cand[niv].size() && !ok; i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int getSize(int)': main.cpp:86:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j<cand[i].size(); j++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int getVal(int)': main.cpp:94:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j<cand[i].size(); j++) ~^~~~~~~~~~~~~~~ main.cpp:97:1: warning: control reaches end of non-void function [-Wreturn-type] } ^