Compilare: user.cpp: In function ‘int main()’: user.cpp:21:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%ld %ld", &n, &m); ^ user.cpp:30:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%ld", &arr[i][j]); ^ user.cpp:37:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%ld%ld", &x, &y); ^ user.cpp:38:92: warning: array subscript is below array bounds [-Warray-bounds] fprintf(fout, "%ld\n", min(arr[log(y-x)][x-1], arr[log(y-x)][y - power[log(y-x)]])); ^