n,w=map(int,input().split())

list=[]

for i in range(n):#генерируем список с 0*n
    list.append(0)

for i in range(w):
    u=input().split()
    p=u[0]
    if p=='A':
        list[int(u[1])-1]=int(u[2])
    else:
        sm=0
        podlist=list[int(u[1])-1:int(u[2])]

        for i in podlist:
            sm+=i

        print(sm)