Compilare: user.cpp: In function ‘int main()’: user.cpp:129:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Queue.front().second.size();i++) ^ user.cpp:138:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<left.size();i++) ^ user.cpp:140:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<right.size();i++) ^ user.cpp:96:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&N,&Q); ^ user.cpp:101:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&Mat[i][j].value); ^ user.cpp:113:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d%d%d",&aux.x1,&aux.y1,&aux.x2,&aux.y2); ^