Compilare: user.cpp: In function ‘void query(int, int, int)’: user.cpp:101: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:148: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:150: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:159: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result