Compilare: user.cpp: In function ‘void preprocess()’: user.cpp:56:29: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] for (int i=1;i+(1<<k-1)<=N;++i) { ^ user.cpp:57:45: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if (v[rmq[i][k-1]]<v[rmq[i+(1<<k-1)][k-1]]) { ^ user.cpp:61:38: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rmq[i][k]=rmq[i+(1<<k-1)][k-1]; ^