Compilare: main.cpp:9:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] #pragma GCC optimization ("O3") main.cpp:10:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] #pragma GCC optimization("unroll-loops") main.cpp: In function 'int SegmentTree::Query(int, int)': main.cpp:85:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < elem.size();i++) ~~^~~~~~~~~~~~~