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:120: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void dfsCN(short int)': user.cpp:138: warning: comparison between signed and unsigned integer expressions user.cpp:161: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int dijkstra()': user.cpp:203: warning: comparison between signed and unsigned integer expressions user.cpp:205: warning: comparison between signed and unsigned integer expressions user.cpp:212: warning: comparison between signed and unsigned integer expressions user.cpp:230: warning: comparison between signed and unsigned integer expressions user.cpp:263: warning: comparison between signed and unsigned integer expressions user.cpp:300: warning: comparison between signed and unsigned integer expressions user.cpp:312: warning: large integer implicitly truncated to unsigned type user.cpp:313: warning: comparison between signed and unsigned integer expressions user.cpp:314: warning: comparison between signed and unsigned integer expressions user.cpp:319: warning: control reaches end of non-void function user.cpp: In function 'int write_data()': user.cpp:125: warning: control reaches end of non-void function user.cpp: In function 'int read_data()': user.cpp:109: warning: control reaches end of non-void function