Compilare: main.cpp: In member function 'bool SegNode::overlaps(int, int)': main.cpp:36:18: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] return (a<=x & x<=b) || (a<=y & y<=b) || ~^~~ main.cpp:36:35: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] return (a<=x & x<=b) || (a<=y & y<=b) || ~^~~ main.cpp:37:18: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] (x<=a & a<=y) || (x<=b & b<=y); ~^~~ main.cpp:37:35: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] (x<=a & a<=y) || (x<=b & b<=y); ~^~~ main.cpp: In function 'int main()': main.cpp:107:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("input.in","r",stdin); ^ main.cpp: In member function 'int SegTree::search_max(int, int)': main.cpp:96:5: warning: control reaches end of non-void function [-Wreturn-type] } ^