Compilare: user.cpp: In function ‘double solve(int, int)’: user.cpp:64:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();++i) ^ user.cpp:65:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i+1;j<v.size()&&j-i<8;++j) ^ user.cpp:53:24: warning: unused variable ‘pos’ [-Wunused-variable] int mid=(st+dr)/2,i,j,pos=st,ind1,ind2; ^ user.cpp:53:31: warning: unused variable ‘ind1’ [-Wunused-variable] int mid=(st+dr)/2,i,j,pos=st,ind1,ind2; ^ user.cpp:53:36: warning: unused variable ‘ind2’ [-Wunused-variable] int mid=(st+dr)/2,i,j,pos=st,ind1,ind2; ^