def arrayManipulation(n, queries):
    
    my_array = [0] * (n+1)
    count = 0
    temp = 0
    for first,last,value in queries:
        
        my_array[first-1] += value
        my_array[last] -= value
    
    for item in my_array:
        count += item
        if count > temp:
            temp = count
       
    return temp