#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define rd_init() char*rp=({char*mmap();mmap(0l,1l<<25,1,2,0,0ll);})
#define rd_skip() while(*rp++>=48)
//#define rd() ({int _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;})
#define rd() getint(&rp)
#define rd_signed() ({int _s=*rp=='-'&&++rp,_v=rd();_s?-_v:_v;})
#define WTHI(v) {unsigned _z=v;int _n=0;ulong _d=0;while(++_n,_d=_d<<8|0x30|_z%10,_z/=10);*(ulong*)wp=_d;wp+=_n;}
#define WTLO(v) {unsigned _z=v;int _n=8;ulong _d=0;while(_d=_d<<8|0x30|_z%10,_z/=10,--_n);*(ulong*)wp=_d;wp+=8;}
#define wt(v) if(v>=100000000){WTHI(v/100000000);WTLO(v);}else{WTHI(v);}

typedef unsigned long ulong;

// https://yukicoder.me/submissions/482915
const ulong ma0 = 1157442765409226768;
const ulong ma1 = 1085102592571150095;
const ulong ma2 = 71777214294589695;
const ulong ma3 = 281470681808895;
const ulong ma4 = 4294967295;
static inline int getint(char**rpp) {
	char*rp=*rpp;
	int pn = *rp=='-'&&++rp;
	ulong tmp = *(ulong*)rp;
	int dig = ((tmp & ma0) ^ ma0) ? 68 - __builtin_ctzl((tmp & ma0) ^ ma0) : 0;
	tmp = tmp << dig & ma1;
	tmp = tmp * 10 + (tmp >> 8) & ma2;
	tmp = tmp * 100 + (tmp >> 16) & ma3;
	tmp = tmp * 10000 + (tmp >> 32) & ma4;
	rp += (72 - dig >> 3);
	*rpp=rp;
	return pn?-tmp:tmp;
}

#define UFSIZE 500002
struct{int u,v;}ufbuf[UFSIZE];
void uf_init(){
	for(int i=0;i<UFSIZE;++i){
		ufbuf[i].u=-1;
		ufbuf[i].v=0;
	}
}
int uf_root(int a){
	int b,t=a;
	int y,z=0;
	while(b=ufbuf[t].u,b>=0) z+=ufbuf[t].v,t=b;
	while(b=ufbuf[a].u,b>=0) y=ufbuf[a].v,ufbuf[a].v=z,z-=y,ufbuf[a].u=t,a=b;
	return t;
}
void uf_unite(int a,int b){
	a=uf_root(a);
	b=uf_root(b);
	if(a!=b){
		if(ufbuf[a].u<ufbuf[b].u){
			ufbuf[b].v-=ufbuf[a].v;
			ufbuf[a].u+=ufbuf[b].u;
			ufbuf[b].u=a;
		}else{
			ufbuf[a].v-=ufbuf[b].v;
			ufbuf[b].u+=ufbuf[a].u;
			ufbuf[a].u=b;
		}
	}
}

char wbuf[1<<25];

int main(){
	uf_init();
	rd_init();
	int n=rd();
	rd_skip();
	char*wp=wbuf;
	while(*rp){
		int t=*rp; rp+=2;
		int a=rd();
		if(t=='1'){
			int b=rd();
			uf_unite(a,b);
		}
		if(t=='2'){
			int b=rd_signed();
			ufbuf[uf_root(a)].v+=b;
		}
		if(t=='3'){
			rp+=2;
			int z=0;
			while(z+=ufbuf[a].v,a=ufbuf[a].u,a>=0);
			if(z<0){
				*wp++='-';
				z=-z;
			}
			wt(z);
			*wp++='\n';
		}
	}
	write(1,wbuf,wp-wbuf);
	_exit(0);
}