import sys

input = sys.stdin.buffer.readline


class Bit:
    """1-indexed"""

    def __init__(self, n):
        self.size = n
        self.tree = [0] * (n + 1)

    def _sum(self, i):
        s = 0
        while i > 0:
            s += self.tree[i]
            i -= i & -i
        return s

    def sum(self, i, j):
        """閉区間[i, j]"""
        return self._sum(j) - self._sum(i - 1)

    def add(self, i, x):
        while i <= self.size:
            self.tree[i] += x
            i += i & -i


N = int(input())
nums = set()
queries = []
for _ in range(N):
    query = tuple(map(int, input().split()))
    queries.append(query)
    if query[0] == 0:
        nums.add(query[1])
    else:
        nums.add(query[1])
        nums.add(query[2])

comp_dict = {x: i for i, x in enumerate(sorted(nums), 1)}
bit = Bit(len(nums))
ans = 0
for q, *t in queries:
    if q == 0:
        x, y = t
        bit.add(comp_dict[x], y)
    else:
        l, r = t
        ans += bit.sum(comp_dict[l], comp_dict[r])
print(ans)