Compilare: user.cpp: In function ‘void query(int, int, int)’: user.cpp:132: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:179: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:181: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:190: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void build(int, int, int)’: user.cpp:61: warning: ‘xmin’ may be used uninitialized in this function user.cpp:61: warning: ‘poz’ may be used uninitialized in this function