Compilare: user.cpp: In function ‘void citire()’: user.cpp:38: warning: comparison between signed and unsigned integer expressions user.cpp:30: warning: unused variable ‘i’ user.cpp:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int BFS()’: user.cpp:78: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:114: warning: comparison between signed and unsigned integer expressions user.cpp:131: warning: comparison between signed and unsigned integer expressions user.cpp:138: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void afisare()’: user.cpp:154: warning: comparison between signed and unsigned integer expressions