Nagini, being a horcrux You-know-who created with the murder of Bertha Jorkins, has accumulated its army of snakes and is launching an attack on Hogwarts school. 

Hogwarts' entrance can be imagined as a straight line (x-axis) from 1 to 105. Nagini is launching various snakes at the Hogwarts entrance. Each snake lands parallel to the entrance, covering a segment at a distance k from x = l to x = r. Formally, each snake can be imagined as being a line segment between points (l, k) and (r, k). Note that k can be both positive and negative, but not 0.

Let, at some x-coordinate x = i, there be snakes at point (i, y1) and point (i, y2), such that y1 > 0 and y2 < 0. Then, if for any point (i, y3) containing a snake such that y3 > 0, y1 ≤ y3 holds and for any point (i, y4) containing a snake such that y4 < 0, |y2| ≤ |y4| holds, then the danger value at coordinate x = i is y1 + |y2|. If no such y1 and y2 exist, danger value is 0. 

Harry wants to calculate the danger value of various segments of the Hogwarts entrance. Danger value for a segment [l, r) of the entrance can be calculated by taking the sum of danger values for each integer x-coordinate present in the segment.

Formally, you have to implement two types of queries:

  * 1 l r k: a snake is added parallel to entrance from x = l to x = r at y-coordinate y = k (l inclusive, r exclusive). 
  * 2 l r: you have to calculate the danger value of segment l to r (l inclusive, r exclusive). 

Input

First line of input contains a single integer q (1 ≤ q ≤ 5·104) denoting the number of queries.

Next q lines each describe a query. Each query description first contains the query type typei (1 ≤ typei ≤ 2). This is followed by further description of the query. In case of the type being 1, it is followed by integers li, ri and ki (<image>,  - 109 ≤ ki ≤ 109, k ≠ 0). Otherwise, it just contains two integers, li and ri (1 ≤ li < ri ≤ 105).

Output

Output the answer for each query of type 2 in a separate line.

Examples

Input

3
1 1 10 10
1 2 4 -7
2 1 10


Output

34


Input

7
1 2 3 5
1 1 10 10
1 4 5 -5
2 4 8
1 1 10 -10
2 4 8
2 1 10


Output

15
75
170

Note

In the first sample case, the danger value for x-coordinates 1 is 0 as there is no y2 satisfying the above condition for x = 1.

Danger values for x-coordinates 2 and 3 is 10 + | - 7| = 17.

Danger values for x-coordinates 4 to 9 is again 0 as there is no y2 satisfying the above condition for these coordinates.

Thus, total danger value is 17 + 17 = 34.
#include <bits/stdc++.h>
using namespace std;
const int BLOCK = 301;
const int CNT = (100010 + BLOCK - 1) / BLOCK;
const int n = CNT * BLOCK;
const int N = n + 10;
inline void upd(int &a, int b) { a = ((a == 0 || b == 0) ? a + b : min(a, b)); }
int a[2][N];
int b[2][CNT];
bool zeros[2][CNT];
vector<int> c[2][CNT];
int sz[2][CNT];
long long sum[CNT];
inline void push(int id) {
  for (int p = 0; p < 2; p++) {
    if (b[p][id] != 0) {
      for (int i = id * BLOCK; i < (id + 1) * BLOCK; i++) {
        upd(a[p][i], b[p][id]);
      }
      b[p][id] = 0;
    }
  }
}
inline void pull(int id) {
  for (int p = 0; p < 2; p++) {
    zeros[p][id] = false;
    for (int i = id * BLOCK; i < (id + 1) * BLOCK; i++) {
      if (a[p][i] == 0) {
        zeros[p][id] = true;
        break;
      }
    }
    if (zeros[p][id]) {
      continue;
    }
    c[p][id].clear();
    for (int i = id * BLOCK; i < (id + 1) * BLOCK; i++) {
      if (a[1 - p][i] != 0) {
        c[p][id].push_back(a[p][i]);
      }
    }
    sz[p][id] = c[p][id].size();
    sort(c[p][id].begin(), c[p][id].end());
  }
  sum[id] = 0;
  for (int i = id * BLOCK; i < (id + 1) * BLOCK; i++) {
    if (a[0][i] > 0 && a[1][i] > 0) {
      sum[id] += a[0][i] + a[1][i];
    }
  }
}
inline void update_block(int id, int p, int k) {
  int old = b[p][id];
  upd(b[p][id], k);
  if (zeros[p][id]) {
    push(id);
    pull(id);
  } else {
    int extra = sz[p][id] - (int)c[p][id].size();
    if (extra > 0 && k < old) {
      sum[id] -= extra * 1LL * (old - k);
    }
    while (!c[p][id].empty() && c[p][id].back() > k) {
      sum[id] -= c[p][id].back() - k;
      c[p][id].pop_back();
    }
  }
}
inline long long get_block(int id) { return sum[id]; }
int main() {
  int tt;
  scanf("%d", &tt);
  for (int p = 0; p < 2; p++) {
    for (int i = 0; i < n; i++) {
      a[p][i] = 0;
    }
  }
  for (int i = 0; i < n / BLOCK; i++) {
    pull(i);
  }
  while (tt--) {
    int type, from, to;
    scanf("%d %d %d", &type, &from, &to);
    to--;
    if (type == 1) {
      int k;
      scanf("%d", &k);
      int p;
      if (k > 0) {
        p = 0;
      } else {
        p = 1;
        k = -k;
      }
      int fid = from / BLOCK;
      int tid = to / BLOCK;
      push(fid);
      if (fid != tid) {
        push(tid);
      }
      while (from <= to && from / BLOCK == fid) {
        upd(a[p][from], k);
        from++;
      }
      while (from <= to && to / BLOCK == tid) {
        upd(a[p][to], k);
        to--;
      }
      pull(fid);
      if (fid != tid) {
        pull(tid);
      }
      for (int id = fid + 1; id <= tid - 1; id++) {
        update_block(id, p, k);
      }
    } else {
      long long ans = 0;
      int fid = from / BLOCK;
      int tid = to / BLOCK;
      push(fid);
      if (fid != tid) {
        push(tid);
      }
      while (from <= to && from / BLOCK == fid) {
        if (a[0][from] > 0 && a[1][from] > 0) {
          ans += a[0][from] + a[1][from];
        }
        from++;
      }
      while (from <= to && to / BLOCK == tid) {
        if (a[0][to] > 0 && a[1][to] > 0) {
          ans += a[0][to] + a[1][to];
        }
        to--;
      }
      pull(fid);
      if (fid != tid) {
        pull(tid);
      }
      for (int id = fid + 1; id <= tid - 1; id++) {
        ans += get_block(id);
      }
      printf("%I64d\n", ans);
    }
  }
  cerr << "time = " << clock() << " ms" << endl;
  return 0;
}
