Compilare: user.cpp: In function ‘void make_rmq()’: user.cpp:32:21: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if (i + (1 << lg - 1) < n) ~~~^~~ user.cpp:33:59: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rmq[lg][i] = max(rmq[lg][i], rmq[lg - 1][i + (1 << lg - 1)]); } } ~~~^~~ user.cpp: In function ‘void divide(int, int, int, int)’: user.cpp:51:15: warning: ‘loc_opt’ may be used uninitialized in this function [-Wmaybe-uninitialized] opt[tk][mid] = loc_opt;