Compilare: user.cpp: In function ‘int main()’: user.cpp:39:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();i++) if(mp[v[i]]==0) mp[v[i]]=(++ind); ^ user.cpp:40:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<p.size();i++) cost[mp[p[i]]]++; ^ user.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<v.size();i++) cost[i]+=cost[i-1]; ^ user.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++) fout<<max(0,cost[mp[s[i].second]]-cost[mp[s[i].first]-1]-1)<<"\n"; ^ user.cpp:16:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,n,m,ind=0; ^