import sys
input = sys.stdin.readline
from collections import *

class BIT:
    def __init__(self, n):
        self.n = n
        self.bit = [0]*(n+1)
    
    def add(self, i, x):
        i += 1
        
        while i<=self.n:
            self.bit[i] += x
            i += i&(-i)

    def acc(self, i):
        s = 0
        
        while i>0:
            s += self.bit[i]
            i -= i&(-i)
        
        return s

def compress(l):
    l = list(set(l))
    l.sort()
    idx = defaultdict(int)

    for i in range(len(l)):
        idx[l[i]] = i
    
    return idx

N, Q = map(int, input().split())
A = list(map(int, input().split()))
LRX = [tuple(map(int, input().split())) for _ in range(Q)]
query = [[] for _ in range(N+1)]

for L, R, X in LRX:
    query[L-1].append(X)
    query[R].append(X)

query_ans = defaultdict(int)
idx = compress(A+[X for _, _, X in LRX])
bit1 = BIT(len(idx.keys()))
bit2 = BIT(len(idx.keys()))

for X in query[0]:
    query_ans[X] = (0, 0)

for i in range(N):
    bit1.add(idx[A[i]], 1)
    bit2.add(idx[A[i]], A[i])
    
    for X in query[i+1]:
        c = bit1.acc(idx[X]+1)
        v = bit2.acc(idx[X]+1)
        query_ans[(i+1)*10**10+X] = (c, v)

for L, R, X in LRX:
    cl, vl = query_ans[(L-1)*10**10+X]
    ans_l = vl+(L-1-cl)*X
    cr, vr = query_ans[R*10**10+X]
    ans_r = vr+(R-cr)*X
    print(ans_r-ans_l)