#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
#pragma GCC optimize("Ofast, unroll-loops", "omit-frame-pointer","inline")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,avx2")
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const int maxN = 1e5 + 10;
ll a[maxN];
int n, m;
void solve() {
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    while (m--) {
        int op;
        cin >> op;
        int l, r;
        cin >> l >> r;
        if (op == 1) {
            ll x;
            cin >> x;
            for (int i = l; i <= r; i++) {
                a[i] = x + (a[i] >= x ? a[i] : -a[i]);
            }
        }
        else {
            ll ans = 0;
            for (int i = l; i <= r; i++) {
                ans += a[i];
            }
            cout << ans << '\n';
        }


    }
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
#ifdef DEBUG
    freopen("input.txt", "r", stdin);
#endif
    int tst;
    cin >> tst;
    while (tst--) {
        solve();
    }
    return 0;
}