def arrayManipulation(n, queries):
    a = [0]*n
    maxx = 0
    x = 0
    for init, final, k in queries:
        if(k == 0):
            continue
        a[init-1] += k
        if(final < n):
            a[final] -= k
    for element in a:
        x += element
        if(maxx < x):
            maxx = x
    return maxx