#!/usr/bin/env python3
n, q = map(int, input().split())
s = input()
t = [0] * -~n
for i in range(n):
    t[i + 1] = t[i] + (1 if s[i:i+2] == "AC" else 0)
for _ in range(q):
    l, r = map(int, input().split())
    print(t[r-1] - t[l-1])