Compilare: user.cpp: In function ‘int get(int, int)’: user.cpp:39:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] int a = rmq[l][bit], b = rmq[r - (1 << bit) + 1][bit]; ^ user.cpp:39:57: warning: array subscript has type ‘char’ [-Wchar-subscripts] int a = rmq[l][bit], b = rmq[r - (1 << bit) + 1][bit]; ^ user.cpp: In function ‘int main()’: user.cpp:97:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&q); ^ user.cpp:99:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&x,&y); ^ user.cpp:117:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " ,&x,&y,&C[i]); ^