Compilare: user.cpp: In function ‘int main()’: user.cpp:54:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(v[j][pos].y+cost<=actx && pos<(v[j].size()-1)) ^ user.cpp:64:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((v[j][pos].y+cost<=actx) && pos<dp[j].size()) {res=max(res,mx[j][pos]); } ^ user.cpp:23:11: warning: unused variable ‘t’ [-Wunused-variable] { int i,j,t,cost,ind,pos,actx,acty,acts,sol=0,res,mxact; ^ user.cpp:23:31: warning: variable ‘acty’ set but not used [-Wunused-but-set-variable] { int i,j,t,cost,ind,pos,actx,acty,acts,sol=0,res,mxact; ^