#include <bits/stdc++.h>
using namespace std;
int n,x,y,z,ans,zs;
map<int,int> mp1;
map<pair<int,int>,int> mp2;
int main(){
	scanf("%d",&n);
	while(n--){
		scanf("%d%d%d",&x,&y,&z);
		if(x==1){
			++zs;
			++mp1[y];
			++mp2[make_pair(y,z)];
		}else if(x==3){
			zs=mp1[y]-mp2[make_pair(y,z)];
			mp1.clear();mp2.clear();
			mp1[y]=zs;
		}else if(x==2) printf("%d\n",zs-mp1[y]);
	}
    return 0;
}

QAQ感觉都对了，为什么嘎掉了QAQ