Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ user.cpp:12:9: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int ok=0; ^~ user.cpp: In function ‘void solveMic()’: user.cpp:40:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ user.cpp: In function ‘void solveMare()’: user.cpp:77:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:110:9: warning: overflow in implicit constant conversion [-Woverflow] mic=2e15; ^~~~ user.cpp:111:9: warning: overflow in implicit constant conversion [-Woverflow] sol=2e15; ^~~~ user.cpp:114:9: warning: overflow in implicit constant conversion [-Woverflow] mic=2e15; ^~~~