//  Codeforces: ganariya
//  AtCoder: ganariya2525
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//include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <unordered_map>
#include <climits>
#include <set>
#include <unordered_set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <queue>
#include <random>
#include <complex>
#include <regex>
#include <locale>
#include <random>

using namespace std;

#define SHOW_VECTOR(v) {std::cerr << #v << "\t:";for(const auto& xxx : v){std::cerr << xxx << " ";}std::cerr << "\n";}
#define SHOW_MAP(v){std::cerr << #v << endl; for(const auto& xxx: v){std::cerr << xxx.first << " " << xxx.second << "\n";}}

using LL = long long;

//~~~~~~~~~~~~~~~~~~~~~_(＾～＾ ｣ ∠)_~~~~~~~~~~~~~~~~~~~~~

struct SegmentTree {
    vector<LL> node;
    int n;

    SegmentTree(vector<LL> a) {
        int sz = a.size();
        n = 1;
        while (n < sz) n *= 2;
        node.resize(2 * n - 1, 0);
        for (int i = 0; i < sz; i++) node[n + i - 1] = a[i];
        for (int i = n - 2; i >= 0; i--) node[i] = node[i * 2 + 1] + node[i * 2 + 2];
    }

    void add(LL index, LL x) {
        index += (n - 1);
        node[index] += x;
        while (index > 0) {
            index = (index - 1) / 2;
            node[index] = node[index * 2 + 1] + node[index * 2 + 2];
        }
    }

    LL get_sum(LL a, LL b, LL k = 0, LL l = 0, LL r = -1) {
        if (r < 0) r = n;
        if (r <= a || b <= l) return 0;
        if (a <= l && r <= b) return node[k];
        LL lv = get_sum(a, b, k * 2 + 1, l, (l + r) / 2);
        LL rv = get_sum(a, b, k * 2 + 2, (l + r) / 2, r);
        return lv + rv;
    }

};

int main() {

    int Q;
    cin >> Q;

    vector<LL> q(Q), x(Q), y(Q);
    for (int i = 0; i < Q; i++) cin >> q[i] >> x[i] >> y[i];

    vector<LL> arr;
    for (int i = 0; i < Q; i++) {
        arr.push_back(x[i]);
        arr.push_back(y[i]);
    }
    sort(arr.begin(), arr.end());
    arr.erase(unique(arr.begin(), arr.end()), arr.end());

    map<LL, LL> m_to, m_rev;
    for (int i = 0; i < arr.size(); i++) {
        m_to[arr[i]] = i;
        m_rev[i] = arr[i];
    }

    SegmentTree segTree(vector<LL>(arr.size(), 0));

    LL ans = 0;
    for (int i = 0; i < Q; i++) {
        if (q[i] == 0) {
            segTree.add(m_to[x[i]], y[i]);
        }
        if (q[i] == 1) {
            ans += segTree.get_sum(m_to[x[i]], m_to[y[i]]+ 1);
        }
    }

    cout << ans << endl;

    return 0;
}