Compilare: main.cpp: In function 'void citire()': main.cpp:15:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++){ ~^~~~~~~~~ main.cpp: In function 'bool cuplaj(int)': main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[node].size();i++){ ~^~~~~~~~~~~~~~~ main.cpp:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[node].size();i++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:55:41: warning: iteration 1005 invokes undefined behavior [-Waggressive-loop-optimizations] for(int i=0;i<=10001;i++) ver[i]=false; ~~~~~~^~~~~~ main.cpp:55:22: note: within this loop for(int i=0;i<=10001;i++) ver[i]=false; ~^~~~~~~