#include <iostream>
#include <algorithm>
#include <vector>
#include <functional>

using namespace std;
#define in(v) v; cin >> v;
#define rep(i,n) for(int i=0;i<(n);++i)
#define all(f,c,...) (([&](decltype((c)) cccc) { return (f)(begin(cccc), end(cccc), ## __VA_ARGS__); })(c))

template<class T> struct SegTree {
  private:
    int size;
    vector<T> v;
    using F = function<T(T,T)>;
    F f; T default_value;
  public:
    SegTree(int n, T default_value, F f) : default_value(default_value), f(f) {
      size = 1;
      while (size < n) size *= 2;
      v.resize(2 * size - 1, default_value);
    }
    void update(int index, T val) {
      index = index + size - 1;
      v[index] += val;
      while (index > 0) {
        index = (index - 1) / 2;
        v[index] = f(v[2 * index + 1], v[2 * index + 2]);
      }
    }
    T query(int l, int r) { return query(l, r, 0, size, 0); }
    T query(int l, int r, int cur_l, int cur_r, int index) {
      // [l, r)に対するクエリ
      if (cur_r <= l || r <= cur_l) return default_value;
      if (l <= cur_l && cur_r <= r) return v[index];

      int mid = (cur_l + cur_r) / 2;
      return f(query(l, r, cur_l, mid, 2 * index + 1), query(l, r, mid, cur_r, 2 * index + 2));
    }
};

int main() {
  int in(N);

  SegTree<int> T(100000, 0, [](int a, int b){return a + b;});

  pair<int, pair<int, int>> query[N];
  vector<int> A;
  rep(i, N) {
    int t;
    cin >> t >> query[i].second.first >> query[i].second.second;
    query[i].first = t;
    if (t == 0)
      A.push_back(query[i].second.first);
  }
  all(sort, A);
  A.erase(all(unique, A), A.end());

  long long ans = 0;
  rep(i, N) {
    int t = query[i].first;
    if (t == 0) {
      auto [x, y] = query[i].second;
      T.update(all(lower_bound, A, x) - A.begin(), y);
    } else {
      auto [l, r] = query[i].second;
      l = all(lower_bound, A, l) - A.begin();
      r = all(lower_bound, A, r+1) - A.begin();
      ans += T.query(l, r);
    }
  }
  cout << ans << endl;

  return 0;
}