Compilare: main.cpp: In function 'void dfs(int)': main.cpp:32:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[nod].size();j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:71:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { for(int k=0;k<s.size();k++) ~^~~~~~~~~ main.cpp:79:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<s.size();k++) ~^~~~~~~~~ main.cpp:64:12: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations] pow5[i]=pow5[i-1]*5; ~~~~~~~^~~~~~~~~~~~ main.cpp:63:15: note: within this loop for(int i=1;i<=5;i++) ~^~~