Compilare: main.cpp: In function 'int main()': main.cpp:33:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();++i) ~^~~~~~~~~ main.cpp:17:17: warning: unused variable 'x' [-Wunused-variable] int n,k,a,b,x,add,opp=0; ^ main.cpp:77:18: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized] val[v[ind].second]+=sgn*minim; ^ main.cpp:77:32: warning: 'sgn' may be used uninitialized in this function [-Wmaybe-uninitialized] val[v[ind].second]+=sgn*minim; ~~~^~~~~~