Compilare: user.cpp: In function 'void dfsCV(int)': user.cpp:87: warning: comparison between signed and unsigned integer expressions user.cpp:109: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int dijkstra(int, int)': user.cpp:135: warning: comparison between signed and unsigned integer expressions user.cpp:160: warning: comparison between signed and unsigned integer expressions user.cpp:191: warning: comparison between signed and unsigned integer expressions user.cpp:226: warning: comparison between signed and unsigned integer expressions user.cpp:233: warning: comparison between signed and unsigned integer expressions user.cpp:234: warning: comparison between signed and unsigned integer expressions user.cpp:249: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int test_printf()': user.cpp:335: warning: comparison between signed and unsigned integer expressions user.cpp:337: warning: comparison between signed and unsigned integer expressions user.cpp:344: warning: control reaches end of non-void function user.cpp: In function 'int init_read()': user.cpp:309: warning: control reaches end of non-void function user.cpp: In function 'int dijkstra(int, int)': user.cpp:257: warning: control reaches end of non-void function