#include <bits/stdc++.h>
using namespace std;
int main()
{
char s[150];
int tc,a,sum=0,amount;
cin>>tc;
while(tc--)
{
scanf("\r");
scanf("%s",s);
if(strcmp(s,"donate")== 0)
{
cin>>amount;
sum+=amount;
//printf("%d\n",sum);
}
else
printf("%d\n",sum);
}
return 0;
}
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