Compilare: main.cpp: In function 'void update(std::vector<int>&, int, int)': main.cpp:21:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; ind < aib.size(); ind += lsb(ind)) ~~~~^~~~~~~~~~~~ main.cpp: In function 'void build(int, int, int)': main.cpp:43:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < g[a].size() && j < g[b].size()) { ~~^~~~~~~~~~~~~ main.cpp:43:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < g[a].size() && j < g[b].size()) { ~~^~~~~~~~~~~~~ main.cpp:52:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < g[a].size()) ~~^~~~~~~~~~~~~ main.cpp:54:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < g[b].size()) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:100:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < g[i].size(); j++) ~~^~~~~~~~~~~~~