Compilare: user.cpp:87:3: warning: "/*" within comment user.cpp: In function ‘void dfs(int)’: user.cpp:13: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int fiud(int)’: user.cpp:19: warning: comparison between signed and unsigned integer expressions user.cpp:23: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:58: warning: comparison between signed and unsigned integer expressions user.cpp:66: warning: comparison between signed and unsigned integer expressions user.cpp:67: warning: suggest explicit braces to avoid ambiguous ‘else’