package main

import (
	"bufio"
	"fmt"
	"os"
)

func demo() {
	seg := NewDynamicSegTreeSparse(0, 10, false)
	root := seg.NewRoot()
	root = seg.Set(root, 1, 1)
	fmt.Println(seg.Query(root, 0, 1), seg.GetAll(root))
}

func main() {
	// https://yukicoder.me/problems/no/789
	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	seg := NewDynamicSegTreeSparse(0, 1e9+10, false)
	root := seg.NewRoot()
	var n int
	fmt.Fscan(in, &n)

	res := 0
	for i := 0; i < n; i++ {
		var op int
		fmt.Fscan(in, &op)
		if op == 0 {
			var a, b int
			fmt.Fscan(in, &a, &b)
			root = seg.Update(root, a, b)
		} else {
			var left, right int
			fmt.Fscan(in, &left, &right)
			res += seg.Query(root, left, right+1)
		}
	}
	fmt.Fprintln(out, res)
}

type E = int

func e() E        { return 0 }
func op(a, b E) E { return a + b }

type DynamicSegTreeSparse struct {
	L, R       int
	persistent bool
	unit       E
}

type SegNode struct {
	idx     int
	l, r    *SegNode
	x, prod E
}

func NewDynamicSegTreeSparse(left, right int, persistent bool) *DynamicSegTreeSparse {
	return &DynamicSegTreeSparse{
		L:          left,
		R:          right,
		persistent: persistent,
		unit:       e(),
	}
}

func (ds *DynamicSegTreeSparse) NewRoot() *SegNode {
	return nil
}

// L<=left<=right<=R
func (ds *DynamicSegTreeSparse) Query(root *SegNode, left, right int) E {
	if left == right {
		return ds.unit
	}
	x := ds.unit
	ds._queryRec(root, ds.L, ds.R, left, right, &x)
	return x
}

func (ds *DynamicSegTreeSparse) QueryAll(root *SegNode) E {
	return ds.Query(root, ds.L, ds.R)
}

// L<=index<R
func (ds *DynamicSegTreeSparse) Set(root *SegNode, index int, value E) *SegNode {
	return ds._setRec(root, ds.L, ds.R, index, value)
}

func (ds *DynamicSegTreeSparse) Get(root *SegNode, index int) E {
	return ds._getRec(root, index)
}

// L<=left<R
func (ds *DynamicSegTreeSparse) Update(root *SegNode, index int, value E) *SegNode {
	return ds._updateRec(root, ds.L, ds.R, index, value)
}

// L<=right<=R
func (ds *DynamicSegTreeSparse) MinLeft(root *SegNode, right int, check func(E) bool) int {
	x := ds.unit
	return ds._minLeftRec(root, ds.L, ds.R, right, check, &x)
}

// L<=left<=R
func (ds *DynamicSegTreeSparse) MaxRight(root *SegNode, left int, check func(E) bool) int {
	x := ds.unit
	return ds._maxRightRec(root, ds.L, ds.R, left, check, &x)
}

func (ds *DynamicSegTreeSparse) GetAll(root *SegNode) []struct {
	index int
	value E
} {
	res := make([]struct {
		index int
		value E
	}, 0)
	ds._getAllRec(root, &res)
	return res
}

func (ds *DynamicSegTreeSparse) _pushUp(node *SegNode) {
	node.prod = node.x
	if node.l != nil {
		node.prod = op(node.l.prod, node.prod)
	}
	if node.r != nil {
		node.prod = op(node.prod, node.r.prod)
	}
}

func (ds *DynamicSegTreeSparse) _newNode(idx int, x E) *SegNode {
	return &SegNode{idx: idx, x: x, prod: x}
}

func (ds *DynamicSegTreeSparse) _copyNode(node *SegNode) *SegNode {
	if node == nil || !ds.persistent {
		return node
	}
	return &SegNode{idx: node.idx, l: node.l, r: node.r, x: node.x, prod: node.prod}
}

func (ds *DynamicSegTreeSparse) _setRec(root *SegNode, l, r, i int, x E) *SegNode {
	if root == nil {
		root = ds._newNode(i, x)
		return root
	}
	root = ds._copyNode(root)
	if root.idx == i {
		root.x = x
		ds._pushUp(root)
		return root
	}
	m := (l + r) >> 1
	if i < m {
		if root.idx < i {
			root.idx, i = i, root.idx
			root.x, x = x, root.x
		}
		root.l = ds._setRec(root.l, l, m, i, x)
	} else {
		if i < root.idx {
			root.idx, i = i, root.idx
			root.x, x = x, root.x
		}
		root.r = ds._setRec(root.r, m, r, i, x)
	}
	ds._pushUp(root)
	return root
}

func (ds *DynamicSegTreeSparse) _updateRec(root *SegNode, l, r, i int, x E) *SegNode {
	if root == nil {
		root = ds._newNode(i, x)
		return root
	}
	root = ds._copyNode(root)
	if root.idx == i {
		root.x = op(root.x, x)
		ds._pushUp(root)
		return root
	}
	m := (l + r) >> 1
	if i < m {
		if root.idx < i {
			root.idx, i = i, root.idx
			root.x, x = x, root.x
		}
		root.l = ds._updateRec(root.l, l, m, i, x)
	} else {
		if i < root.idx {
			root.idx, i = i, root.idx
			root.x, x = x, root.x
		}
		root.r = ds._updateRec(root.r, m, r, i, x)
	}
	ds._pushUp(root)
	return root
}

func (ds *DynamicSegTreeSparse) _queryRec(root *SegNode, l, r, ql, qr int, x *E) {
	ql = max(ql, l)
	qr = min(qr, r)
	if ql >= qr || root == nil {
		return
	}
	if l == ql && r == qr {
		*x = op(*x, root.prod)
		return
	}
	m := (l + r) >> 1
	ds._queryRec(root.l, l, m, ql, qr, x)
	if ql <= root.idx && root.idx < qr {
		*x = op(*x, root.x)
	}
	ds._queryRec(root.r, m, r, ql, qr, x)
}

func (ds *DynamicSegTreeSparse) _minLeftRec(root *SegNode, l, r, qr int, check func(E) bool, x *E) int {
	if root == nil || qr <= l {
		return ds.L
	}
	if check(op(root.prod, *x)) {
		*x = op(root.prod, *x)
		return ds.L
	}
	m := (l + r) >> 1
	k := ds._minLeftRec(root.r, m, r, qr, check, x)
	if k != ds.L {
		return k
	}
	if root.idx < qr {
		*x = op(root.x, *x)
		if !check(*x) {
			return root.idx + 1
		}
	}
	return ds._minLeftRec(root.l, l, m, qr, check, x)
}

func (ds *DynamicSegTreeSparse) _maxRightRec(root *SegNode, l, r, ql int, check func(E) bool, x *E) int {
	if root == nil || r <= ql {
		return ds.R
	}
	if check(op(*x, root.prod)) {
		*x = op(*x, root.prod)
		return ds.R
	}
	m := (l + r) >> 1
	k := ds._maxRightRec(root.l, l, m, ql, check, x)
	if k != ds.R {
		return k
	}
	if ql <= root.idx {
		*x = op(*x, root.x)
		if !check(*x) {
			return root.idx
		}
	}
	return ds._maxRightRec(root.r, m, r, ql, check, x)
}

func (ds *DynamicSegTreeSparse) _getAllRec(root *SegNode, res *[]struct {
	index int
	value E
}) {
	if root == nil {
		return
	}
	ds._getAllRec(root.l, res)
	*res = append(*res, struct {
		index int
		value E
	}{root.idx, root.x})
	ds._getAllRec(root.r, res)
}

func (ds *DynamicSegTreeSparse) _getRec(root *SegNode, idx int) E {
	if root == nil {
		return ds.unit
	}
	if idx == root.idx {
		return root.x
	}
	if idx < root.idx {
		return ds._getRec(root.l, idx)
	}
	return ds._getRec(root.r, idx)
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}