#include<bits/stdc++.h>
using namespace std;

template<class S,S(*op)(S,S),S(*e)()>
class dynamic_segtree {
public:
	dynamic_segtree(const size_t& n) :n(n), root(nullptr) {}
private:
	struct node {
		S val;
		node* left;
		node* right;

		node(const S& v) :val(v), left(nullptr), right(nullptr) {}
	};
	node* root;
	size_t n;
public:
	void update(const size_t& p, const S& x) { internal_update(root, 0, n, p, x); }
	void add(const size_t& p, const S& x) { internal_add(root, 0, n, p, x); }
	S operator[](const size_t& p) { return internal_access(root, 0, n, p); }
	S prod(const size_t& l, const size_t& r) { return internal_prod(root, 0, n, l, r); }

private:
	void internal_update(node*& p, const size_t& l, const size_t& r, const  size_t& idx, const S& new_val) {
		if (p == nullptr) {
			p = new node(e());
		}

		if (r - l == 1) {
			p->val = new_val;
			return;
		}

		size_t mid = (l + r) >> 1;
		if (idx < mid) internal_update(p->left, l, mid, idx, new_val);
		else internal_update(p->right, mid, r, idx, new_val);
		p->val = e();
		if (p->left!=nullptr) p->val = op(p->left->val, p->val);
		if (p->right!=nullptr) p->val = op(p->val, p->right->val);
	}
	void internal_add(node*& p, const size_t& l, const size_t& r, const  size_t& idx, const S& new_val) {
		if (p == nullptr) {
			p = new node(e());
		}

		if (r - l == 1) {
			p->val = op(p->val, new_val);;
			return;
		}

		size_t mid = (l + r) >> 1;
		if (idx < mid) internal_add(p->left, l, mid, idx, new_val);
		else internal_add(p->right, mid, r, idx, new_val);
		p->val = e();
		if (p->left!=nullptr) p->val = op(p->left->val, p->val);
		if (p->right!=nullptr) p->val = op(p->val, p->right->val);
	}


	S internal_access(node*& p, const size_t& l, const size_t& r, const  size_t& idx) {
		if (p == nullptr) {
			return e();
		}
		if (r - l == 1) {
			return p->val;
		}

		size_t mid = (l + r) >> 1;
		if (idx < mid) return internal_access(p->left, l, mid, idx);
		else return internal_access(p->right, mid, r, idx);
	}

	S internal_prod(node*& p, const size_t& l, const size_t& r, const size_t& L, const size_t& R) {
		if (p == nullptr || r <= L || R <= l) {
			return e();
		}
		if (L <= l && r <= R) {
			return p->val;
		}
		size_t mid = (l + r) >> 1;
		return op(internal_prod(p->left, l, mid, L, R), internal_prod(p->right, mid, r, L, R));
	}
};


int op(int x, int y) { return x + y; }
int e() { return 0; }
int main() {
	const size_t n = 1000000001;
	dynamic_segtree<int, op, e> seg(n);

	int q;
	cin >> q;
	long long ans = 0;
	while (q--) {
		int type;
		cin >> type;
		if (type == 0) {
			size_t x;
			long long y;
			cin >> x >> y;
			seg.add(x, y);
		}
		else {
			size_t l, r;
			cin >> l >> r;
			ans += seg.prod(l, r + 1);

			//cout << "ANS:" << seg.prod(l, r + 1) << '\n';
		}
		/*
		cout << "[";
		for (int i = 0; i < 20; i++) {
			cout << seg[i] << ' ';
		}
		cout << "]\n";
		*/
	}
	cout << ans << '\n';
}