Compilare: user.cpp: In function ‘int main()’: user.cpp:91:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1;i<vx.size();i++){ ^ user.cpp:94:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos+1 < vx.size()) vx.pop_back(); ^ user.cpp:98:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(gr=1;gr<vx.size();gr++){ ^ user.cpp:100:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sgm.size();i++){ ^ user.cpp:119:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(step <= vx.size()) step <<= 1; ^ user.cpp:121:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cbGroup+step < vx.size()){ ^ user.cpp:128:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(step <= group[cbGroup].size()) step <<= 1; ^ user.cpp:130:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(step+pos < group[cbGroup].size()){ ^