import sys
readline = sys.stdin.readline

class Fenwick_Tree:
    def __init__(self, n):
        self._n = n
        self.data = [0] * n
 
    def add(self, p, x):
        assert 0 <= p < self._n
        p += 1
        while p <= self._n:
            self.data[p - 1] += x
            p += p & -p
 
    def sum(self, l, r):
        assert 0 <= l <= r <= self._n
        return self._sum(r) - self._sum(l)
 
    def _sum(self, r):
        s = 0
        while r > 0:
            s += self.data[r - 1]
            r -= r & -r
        return s
    
    def get(self, k):
        k += 1
        x, r = 0, 1
        while r < self._n:
            r <<= 1
        len = r
        while len:
            if x + len - 1 < self._n:
                if self.data[x + len - 1] < k:
                    k -= self.data[x + len - 1]
                    x += len
            len >>= 1
        return x

N, Q = map(int, readline().split())
A = list(map(int, readline().split()))

D = []
for i in range(N):
    D.append((A[i], -1, -1, i))
for i in range(Q):
    L, R, X = map(int, readline().split())
    L -= 1
    D.append((X, L, R, i))

D.sort()
BIT_X = Fenwick_Tree(N)
BIT_A = Fenwick_Tree(N)
ans = [0] * Q
for i in range(N):
    BIT_X.add(i, 1)
for X, L, R, i in D:
    if L == -1:
        BIT_X.add(i, -1)
        BIT_A.add(i, A[i])
    else:
        ans[i] = BIT_A.sum(L, R) + BIT_X.sum(L, R) * X
for a in ans:
    print(a)