Compilare: user.cpp: In function ‘int find_parent(clqtree_node*, clqtree_node*)’: user.cpp:117: warning: comparison between signed and unsigned integer expressions user.cpp:128: warning: comparison between signed and unsigned integer expressions user.cpp:116: warning: unused variable ‘y’ user.cpp: In function ‘void df_clqtree(clqtree_node*)’: user.cpp:181: warning: comparison between signed and unsigned integer expressions user.cpp:188: warning: comparison between signed and unsigned integer expressions user.cpp:195: warning: comparison between signed and unsigned integer expressions user.cpp:204: warning: comparison between signed and unsigned integer expressions user.cpp:210: warning: comparison between signed and unsigned integer expressions user.cpp:219: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int find_max_value(clqtree_node*, int*)’: user.cpp:236: warning: comparison between signed and unsigned integer expressions user.cpp:251: warning: comparison between signed and unsigned integer expressions user.cpp:257: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void read_data()’: user.cpp:265: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:266: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:268: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:274: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void write_data(int, int*)’: user.cpp:282: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int find_max_value(clqtree_node*, int*)’: user.cpp:235: warning: ‘oky’ may be used uninitialized in this function user.cpp: In function ‘clqtree_node* build_clqtree(int, int*)’: user.cpp:138: warning: ‘root’ may be used uninitialized in this function