Compilare: user.cpp: In function ‘int main()’: user.cpp:38:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x+step<H[i].size()&&H[i][x+step]<v[j].first) x+=step; ^ user.cpp:55:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x+step<H[i].size()&&H[i][x+step]<v[poz].first) x+=step; ^ user.cpp:56:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x<H[i].size()-1) x++; ^