int main(){
//ifstream in("input.txt");
short commds;
BandwidthManager bm;
int commands;
string command;
ios_base::sync_with_stdio(false);
cin>>commands;
while (commands--)
{
string command,load;
cin>>command;
if(command == "rcv"){
cin>>command>>load;
bm.rcv(command,load);
}
else if(command == "send"){
