Compilare: user.cpp: In function 'void write_data()': user.cpp:113: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void dfsCN(short int)': user.cpp:152: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void dijkstra()': user.cpp:193: warning: comparison between signed and unsigned integer expressions user.cpp:210: warning: comparison between signed and unsigned integer expressions user.cpp:263: warning: comparison between signed and unsigned integer expressions user.cpp:264: warning: comparison between signed and unsigned integer expressions user.cpp:264: warning: comparison between signed and unsigned integer expressions