Compilare: user.cpp: In function ‘void read()’: user.cpp:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:33: 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:44: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void make_a(int, int)’: user.cpp:78: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:107: warning: comparison between signed and unsigned integer expressions user.cpp:112: warning: comparison between signed and unsigned integer expressions user.cpp:123: warning: comparison between signed and unsigned integer expressions user.cpp:131: warning: comparison between signed and unsigned integer expressions user.cpp:136: warning: comparison between signed and unsigned integer expressions user.cpp:160: warning: comparison between signed and unsigned integer expressions user.cpp:172: warning: comparison between signed and unsigned integer expressions user.cpp:191: warning: comparison between signed and unsigned integer expressions user.cpp:206: warning: comparison between signed and unsigned integer expressions user.cpp:208: warning: comparison between signed and unsigned integer expressions user.cpp:216: warning: comparison between signed and unsigned integer expressions user.cpp:98: warning: unused variable ‘ok’