Compilare: user.cpp: In function ‘void read()’: user.cpp:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void tare_conex(int)’: user.cpp:42: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void make_a(int, int)’: user.cpp:76: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:105: warning: comparison between signed and unsigned integer expressions user.cpp:110: warning: comparison between signed and unsigned integer expressions user.cpp:117: warning: comparison between signed and unsigned integer expressions user.cpp:121: warning: comparison between signed and unsigned integer expressions user.cpp:126: warning: comparison between signed and unsigned integer expressions user.cpp:160: warning: comparison between signed and unsigned integer expressions user.cpp:179: warning: comparison between signed and unsigned integer expressions user.cpp:193: warning: comparison between signed and unsigned integer expressions user.cpp:195: warning: comparison between signed and unsigned integer expressions user.cpp:96: warning: unused variable ‘k’ user.cpp:96: warning: unused variable ‘ok’