Compilare: user.cpp: In function ‘void build(int, int, int)’: user.cpp:20:15: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = st + dr >> 1; ^ user.cpp: In function ‘int qmin(int, int, int, int, int)’: user.cpp:30:15: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = st + dr >> 1; ^ user.cpp: In function ‘int qmax(int, int, int, int, int)’: user.cpp:43:15: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid = st + dr >> 1; ^ user.cpp: In function ‘int main()’: user.cpp:93:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(h.size() == k && qmax(1, n, 1, 1, k) - qmin(1, n, 1, 1, k) + 1 == k) ^