#!/mnt/c/Users/moiki/bash/env/bin/python
N = int(input())

Q = [ list(map(int, input().split())) for _ in range(N)]

from collections import defaultdict
from bisect import bisect_left, bisect_right
pairdic = defaultdict(int)

inf = float("inf")
ans = 0
for q,x,y in Q:
    if q == 0:
        pairdic[x] += y

        idx_cnt = [ (idx, pairdic[idx]) for idx in pairdic.keys()]
        idx_cnt = sorted(idx_cnt)

    if q == 1:
        l,r = x,y
        lidx = bisect_left(  idx_cnt, (l,0))
        ridx = bisect_right(  idx_cnt, (r,inf))
        #print(idx_cnt)
        #print(lidx, ridx)
        ans += sum( list(map(lambda x: x[1], idx_cnt))[lidx:ridx], 0)
        # print("ans: ", ans)

print(ans)