#97

#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
#include <queue>
#include <map>
#include <string.h>
#include <math.h>
#include <stdio.h>
#include <deque>
#include <bits/stdc++.h>
//#include "testlib.h"
using namespace std;
#define ll long long
#define pii pair<int,int>
#define qi ios::sync_with_stdio(0)

bool debug=true;

/*    *************************************
	  * Written in New Computer           *
	  * The following code belongs to     *
	  * XiaoGeNintendo of HellHoleStudios *
	  *************************************
*/
template<typename T1,typename T2>ostream& operator<<(ostream& os,pair<T1,T2> ptt){
	os<<ptt.first<<","<<ptt.second;
	return os;
}
template<typename T>ostream& operator<<(ostream& os,vector<T> vt){
	os<<"{";
	for(int i=0;i<vt.size();i++){
		os<<vt[i]<<" ";
	}
	os<<"}";
	return os;
}

ll deltax=0,deltay=0;
map<int,ll> mp;

int main(){
	qi;
	int q;
	cin>>q;
	while(q--){
		string s;
		cin>>s;
		if(s=="renshuu"){
			ll x,y;
			cin>>x>>y;
			mp[x-deltax]=y-deltay;
		}else if(s=="shitsumon"){
			int x;
			cin>>x;
			cout<<deltay<<endl;
		}else if(s=="gisei"){
			int x;
			cin>>x;
			deltax+=x;
		}else if(s=="shukufuku"){
			int x;
			cin>>x;
			deltay+=x;
		}
	}
	
	return 0;
}