Compilare: user.cpp:2:57: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] long long d[5000000],v[5000000],Y,n,s,p,t,D=-1,S,i;main(){std::ifstream a("branza.in");std::ofstream b("branza.out");a>>n>>s>>t;for(;i<n;++i){a>>v[i]>>p;if(d[Y]==i-t-1)++Y;while(Y<=D&&v[i]<=v[d[D]]+(i-d[D])*s)--D;d[++D]=i;S+=p*(v[d[Y]]+(i-d[Y])*s);}b<<S;} ^