Compilare: user.cpp: In function ‘void torol(int)’: user.cpp:40:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p*2<x.size() && x[p*2].first<x[poz].first) poz=p*2; ^ user.cpp:41:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p*2+1<x.size() && x[p*2+1].first<x[poz].first) poz=p*2+1; ^ user.cpp: In function ‘int main()’: user.cpp:58:17: warning: unused variable ‘j’ [-Wunused-variable] int n,i,a,b,j,h; ^