# 全合計ならどの数字がどこにあるかの記録で可能かも

from collections import defaultdict
dic = defaultdict(list)
N, Q = map(int, input().split())
A = list(map(int, input().split()))
for i in range(N):
    dic[A[i]].append(i)
    
dic_keys = sorted([a for a in dic.keys()])

# append順から言ってsort済みだろう
#for key in dic_keys:
#    dic[key].sort()
    
from bisect import *
for q in range(Q):
    l, r, x = map(int, input().split())
    ans = 0
    for key in dic_keys:
        l_idx = bisect_left(dic[key], l-1)
        r_idx = bisect_right(dic[key], r-1)
        if key <= x:
            calc = key*(r_idx-l_idx)
        else:
            calc = x*(r_idx-l_idx)
        ans += calc
        #print('key', key, 'dic[key]', dic[key], 'l_idx', l_idx, 'r_idx', r_idx, r_idx-l_idx, calc)
    print(ans)