Compilare: user.cpp: In function ‘void coboara(int)’: user.cpp:20:24: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if(heap[ k << 1 + 1 ] < heap[ son ] && k << 1 + 1 <= n) ^ user.cpp:20:54: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if(heap[ k << 1 + 1 ] < heap[ son ] && k << 1 + 1 <= n) ^ user.cpp:21:25: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] son = k << 1 + 1; ^