Compilare: main.cpp: In function 'int timp(int)': main.cpp:49:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int f = 0 ; f < v[nod_curent].size() ; f ++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:100:9: warning: unused variable 'st' [-Wunused-variable] int st = 0, dr = k ; ^~ main.cpp:100:17: warning: unused variable 'dr' [-Wunused-variable] int st = 0, dr = k ; ^~