#include "bits/stdc++.h"
using namespace std;
#define int long long
#define FOR(i, a, b) for(int i=(a);i<(b);i++)
#define RFOR(i, a, b) for(int i=(b-1);i>=(a);i--)
#define REP(i, n) for(int i=0; i<(n); i++)
#define RREP(i, n) for(int i=(n-1); i>=0; i--)
#define ALL(a) (a).begin(),(a).end()
#define UNIQUE_SORT(l) sort(ALL(l)); l.erase(unique(ALL(l)), l.end());
#define CONTAIN(a, b) find(ALL(a), (b)) != (a).end()
#define array2(type, x, y) array<array<type, y>, x>
#define vector2(type) vector<vector<type> >
#define out(...) printf(__VA_ARGS__)

int dxy[] = {0, 1, 0, -1, 0};

void solve();
signed main()
{
#if DEBUG
    std::ifstream in("input.txt");
    std::cin.rdbuf(in.rdbuf());
#endif
    cin.tie(0);
    ios::sync_with_stdio(false);
    solve();
    return 0;
}

/*================================*/

template<typename T> class ST {
    using F = function<T(T, T)>;
    int size;
    T init;
    F f;
    vector<T> seg;
    int depth = 0;
    
public: ST(int size, T init, F f): size(size), init(init), f(f) {
    while (1<<depth < size) depth++;
    seg.assign(2<<depth, init);
}
    
    void update(int k, T t) {
        k += 1 << depth;
        seg[k] += t;
        while(k>>=1) seg[k] = f(seg[2*k], seg[2*k+1]);
    }
    
    T query(int a, int b) {
        a += 1<<depth;
        b += 1<<depth;
        T l = init;
        T r = init;
        while(a < b) {
            if (a & 1) l = f(l, seg[a++]);
            if (b & 1) r = f(r, seg[--b]);
            a >>= 1;
            b >>= 1;
        }
        return f(l, r);
    }
    
    T operator[] (int k) {
        return seg[k + (1<<depth)];
    }
};

int N;
int Q[11111][3];
map<int,int> M;
void solve() {
    cin>>N;
    vector<int> nums;
    REP(i,N) REP(j,3) cin>>Q[i][j];
    REP(i,N) {
        if (Q[i][0]==0) {
            nums.push_back(Q[i][1]);
        }
        else {
            nums.push_back(Q[i][1]);
            nums.push_back(Q[i][2]);
        }
    }
    UNIQUE_SORT(nums);
    auto S = new ST<int>(nums.size()+1, 0, [](int a, int b){return a + b;});
    REP(i,nums.size()) {
        M[nums[i]] = i;
    }
    int ans = 0;
    REP(i,N) {
        if (Q[i][0]==0) {
            int x = Q[i][1], y = Q[i][2];
            S->update(M[x], y);
        }
        else {
            int l = Q[i][1], r = Q[i][2];
            int li = M[l], ri = M[r];
            ans += S->query(li, ri+1);
        }
    }
    
    cout << ans << endl;
}