Compilare: user.cpp: In function ‘int init_rmq()’: user.cpp:17:86: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if (a[r][rmq[r][i][j - 1]] > a[r][rmq[r][i + (1 << j - 1)][j - 1]]) { ^ user.cpp:20:75: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rmq[r][i][j] = rmq[r][i + (1 << j - 1)][j - 1]; ^ user.cpp:25:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^