#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector>

#include <atcoder/fenwicktree>

__attribute__((constructor))
void fast_io() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
}

int main() {
    size_t q;
    std::cin >> q;

    std::vector<int> type(q), a(q), b(q), xs;
    for (size_t i = 0; i < q; ++i) {
        std::cin >> type[i] >> a[i] >> b[i];
        if (type[i] == 0) xs.push_back(a[i]);
    }

    std::sort(xs.begin(), xs.end());
    xs.erase(unique(xs.begin(), xs.end()), xs.end());
    atcoder::fenwick_tree<int> fw(xs.size());

    long long ans = 0;
    for (size_t i = 0; i < q; ++i) {
        if (type[i] == 0) {
            size_t j = std::distance(xs.begin(), std::lower_bound(xs.begin(), xs.end(), a[i]));
            fw.add(j, b[i]);
        } else {
            size_t l = std::distance(xs.begin(), std::lower_bound(xs.begin(), xs.end(), a[i]));
            size_t r = std::distance(xs.begin(), std::upper_bound(xs.begin(), xs.end(), b[i]));
            ans += fw.sum(l, r);
        }
    }
    std::cout << ans << '\n';
}