Compilare: user.cpp: In function ‘int main()’: user.cpp:37:41: 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:40:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==poz&&x<H[i].size()-1) ++x; ^