Compilare: main.cpp: In function 'void update2(int, int, str)': main.cpp:57:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; x <= vec[t].size(); x += (x & -x) ){ ^ main.cpp: In function 'int main()': main.cpp:101:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < vec[i].size(); j++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int cautbin(int)': main.cpp:34:1: warning: control reaches end of non-void function [-Wreturn-type] } ^