Compilare: user.cpp: In function 'int read_data()': user.cpp:89: warning: large integer implicitly truncated to unsigned type user.cpp: In function 'int write_data()': user.cpp:121: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void dfsCN(short int)': user.cpp:141: warning: comparison between signed and unsigned integer expressions user.cpp:160: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int dijkstra()': user.cpp:200: warning: comparison between signed and unsigned integer expressions user.cpp:217: warning: comparison between signed and unsigned integer expressions user.cpp:258: warning: comparison between signed and unsigned integer expressions user.cpp:267: warning: large integer implicitly truncated to unsigned type user.cpp:268: warning: comparison between signed and unsigned integer expressions user.cpp:269: warning: comparison between signed and unsigned integer expressions user.cpp:274: warning: control reaches end of non-void function user.cpp: In function 'int write_data()': user.cpp:126: warning: control reaches end of non-void function user.cpp: In function 'int read_data()': user.cpp:110: warning: control reaches end of non-void function