Compilare: user.cpp: In function ‘int main()’: user.cpp:27:16: warning: operation on ‘X’ may be undefined [-Wsequence-point] X=--X%(2*M-1); ^ user.cpp:28:16: warning: operation on ‘Y’ may be undefined [-Wsequence-point] Y=--Y%(2*M-1); ^ user.cpp:22:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%lld%lld%lld",&N,&M,&Q); ^ user.cpp:26:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%lld%lld",&X,&Y); ^