#include <cassert>
#include <cstddef>
#include <iostream>
#include <unordered_map>

template <class S, S (*op)(S, S), S (*e)()> class dynamic_segtree {
public:
    void set(size_t p, S x) {
        assert(p < n);
        for (node[p += n] = x; p >>= 1;)
            node[p] = op(value(p << 1 | 0), value(p << 1 | 1));
    }

    S get(size_t p) {
        assert(p < n);
        return value(p + n);
    }

    S prod(size_t l, size_t r) {
        assert(l <= r && r <= n);
        S resl = e(), resr = e();
        for (l += n, r += n; l < r; l >>= 1, r >>= 1) {
            if (l & 1) resl = op(resl, value(l++));
            if (r & 1) resr = op(value(--r), resr);
        }
        return op(resl, resr);
    }

private:
    std::unordered_map<size_t, S> node;
    size_t n;

    S value(size_t p) { return node.count(p) ? node[p] : e(); }
};

using S = int;
S op(S a, S b) { return a + b; }
S e() { return 0; }

int main() {
    dynamic_segtree<S, op, e> seg;

    size_t q;
    std::cin >> q;
    long long ans = 0;
    while (q--) {
        int type;
        std::cin >> type;
        if (type == 0) {
            size_t x;
            int y;
            std::cin >> x >> y;
            seg.set(x, seg.get(x) + y);
        } else {
            size_t l, r;
            std::cin >> l >> r;
            ans += seg.prod(l, r + 1);
        }
    }
    std::cout << ans << '\n';
}