Compilare: main.cpp:8:32: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] vector < int > result (1 << 20 + 5, 0); ~~~^~~ main.cpp:12:22: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] bool visited[1 << 20 + 5], bit[1 << 20 + 5]; ~~~^~~ main.cpp:12:40: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] bool visited[1 << 20 + 5], bit[1 << 20 + 5]; ~~~^~~ main.cpp: In function 'void Euler()': main.cpp:20:31: warning: comparison of constant '2' with boolean expression is always true [-Wbool-compare] if (visited[node] < 2) ~~~~~~~~~~~~~~^~~ main.cpp:23:75: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] int new_node = ( (node * 2) | visited[node] ) & ( (1 << n - 1) - 1) ; ~~^~~