#include <bits/stdc++.h>
//!===========================================================!//
//!  dP     dP                          dP                    !//
//!  88     88                          88                    !//
//!  88aaaaa88a .d8888b. .d8888b. .d888b88 .d8888b. 88d888b.  !//
//!  88     88  88ooood8 88'  `88 88'  `88 88ooood8 88'  `88  !//
//!  88     88  88.  ... 88.  .88 88.  .88 88.  ... 88        !//
//!  dP     dP  `88888P' `88888P8 `88888P8 `88888P' dP        !//
//!===========================================================!//
using ld = long double;
using ll = long long;
std::mt19937 mt{std::random_device{}()};
template <typename F>
constexpr F PI() { return 3.1415926535897932385; }
template <typename T, std::size_t N>
std::ostream& operator<<(std::ostream& os, const std::array<T, N>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename T, typename A>
std::ostream& operator<<(std::ostream& os, const std::deque<T, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename K, typename T, typename C, typename A>
std::ostream& operator<<(std::ostream& os, const std::multimap<K, T, C, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << "<" << e.first << ": " << e.second << ">,"; }
    return (os << "]" << std::endl);
}
template <typename T, typename C, typename A>
std::ostream& operator<<(std::ostream& os, const std::multiset<T, C, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename K, typename T, typename C, typename A>
std::ostream& operator<<(std::ostream& os, const std::map<K, T, C, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << "<" << e.first << ": " << e.second << ">,"; }
    return (os << "]" << std::endl);
}
template <typename T1, typename T2>
std::ostream& operator<<(std::ostream& os, const std::pair<T1, T2>& v) { return (os << "<" << v.first << "," << v.second << ">"); }
template <typename T, typename C, typename A>
std::ostream& operator<<(std::ostream& os, const std::set<T, C, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename K, typename T, typename H, typename P, typename A>
std::ostream& operator<<(std::ostream& os, const std::unordered_multimap<K, T, H, P, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << "<" << e.first << ": " << e.second << ">,"; }
    return (os << "]" << std::endl);
}
template <typename T, typename H, typename P, typename A>
std::ostream& operator<<(std::ostream& os, const std::unordered_multiset<T, H, P, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename K, typename T, typename H, typename P, typename A>
std::ostream& operator<<(std::ostream& os, const std::unordered_map<K, T, H, P, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << "<" << e.first << ": " << e.second << ">,"; }
    return (os << "]" << std::endl);
}
template <typename T, typename H, typename P, typename A>
std::ostream& operator<<(std::ostream& os, const std::unordered_set<T, H, P, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename T, typename A>
std::ostream& operator<<(std::ostream& os, const std::vector<T, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
#define show(x) std::cerr << #x << " = " << (x) << std::endl
//!==============================================================================================!//
//!  888888ba                                        oo             .d88888b                     !//
//!  88    `8b                                                      88.    "'                    !//
//!  88     88 dP    dP 88d888b. .d8888b. 88d8b.d8b. dP .d8888b.    `Y88888b. .d8888b. .d8888b.  !//
//!  88     88 88    88 88'  `88 88'  `88 88'`88'`88 88 88'  `""          `8b 88ooood8 88'  `88  !//
//!  88    .8P 88.  .88 88    88 88.  .88 88  88  88 88 88.  ...    d8'   .8P 88.  ... 88.  .88  !//
//!  8888888P  `8888P88 dP    dP `88888P8 dP  dP  dP dP `88888P'     Y88888P  `88888P' `8888P88  !//
//!                 .88                                                                     .88  !//
//!             d8888P                                                                  d8888P   !//
//!=================================================================--===========================!//
template <typename Monoid, std::size_t SUPBIT = 30, typename Ind = std::size_t>
class DynamicSeg
{
public:
    static constexpr Ind SUP = (Ind)1 << SUPBIT;
    using BaseMonoid = Monoid;
    using T = typename Monoid::T;
    DynamicSeg() : root{std::make_shared<Node>()} {}
    T get(const Ind a) const
    {
        Ptr p = root;
        Ind L = 0, R = SUP;
        for (; p->left;) {
            const Ind M = (L + R) / 2;
            p = (a < M ? p->left : p->right), (a < M ? R : L) = M;
        }
        return p->V;
    }
    void set(const Ind a, const T& val)
    {
        auto rec = [&](auto&& self, const Ptr p, Ind L, Ind R) -> void {
            if (L == a and R == a + 1) {
                p->V = val;
            } else {
                if (not p->left) { p->bear(); }
                const Ind M = (L + R) / 2;
                Ptr next = (a < M ? p->left : p->right);
                (a < M ? R : L) = M, self(self, next, L, R);
                p->V = acc(p->left->V, p->right->V);
            }
        };
        rec(rec, root, 0, SUP);
    }
    T accumulate(const Ind L, const Ind R) const
    {
        auto rec = [&](auto&& self, const Ptr p, const Ind l, const Ind r, const Ind L, const Ind R) -> T {
            if (L >= r or R <= l) { return Monoid::id(); }
            if (l == L and r == R) { return p->V; }
            if (not p->left) { return p->V; }
            const Ind M = (L + R) / 2;
            const T lv = self(self, p->left, l, std::min(M, r), L, M), rv = self(self, p->right, std::max(l, M), r, M, R);
            return acc(lv, rv);
        };
        return rec(rec, root, L, R, 0, SUP);
    }

private:
    const Monoid acc{};
    struct Node
    {
        Node() : V{Monoid::id()} {}
        void bear() { left = std::make_shared<Node>(), right = std::make_shared<Node>(); }
        using Ptr = std::shared_ptr<Node>;
        T V;
        Ptr left, right;
    };
    using Ptr = typename Node::Ptr;
    Ptr root;
};
struct Monoid
{
    using T = ll;
    T operator()(const T& a, const T& b) const { return a + b; }
    static constexpr T id() { return 0; }
};
int main()
{
    DynamicSeg<Monoid, 40> dseg;
    int Q;
    std::cin >> Q;
    ll ans = 0;
    for (int q = 0; q < Q; q++) {
        int t;
        std::cin >> t;
        if (t == 0) {
            int x;
            ll y;
            std::cin >> x >> y;
            dseg.set(x, dseg.get(x) + y);
        } else {
            int l, r;
            std::cin >> l >> r, r++;
            ans += dseg.accumulate(l, r);
        }
    }
    std::cout << ans << std::endl;
    return 0;
}