Compilare: user.cpp: In function ‘int main()’: user.cpp:91:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[j][i]=std::max(h[a[j][c[i&(-i)]]], b[j][i-(i&(-i))]); ^ user.cpp:53:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &k); ^ user.cpp:55:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^ user.cpp:59:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &m); ^ user.cpp:62:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &x, &y, &z); ^ user.cpp:79:17: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] int p; ^