from sys import stdin


def main(inp, inps):
    N, Q = map(int, inp().split())
    L, R = list(zip(*map(lambda x: list(map(int, x.split())), inps())))
    now_bit = 0
    result = [0]*Q
    for i, (l, r) in enumerate(zip(L, R)):
        now_bit += int("1"*(r-l+1) + "0"*(l-1))
        result[i] = sum(1 for x in map(int, str(now_bit)) if x%2)
    
    print("\n".join(map(str, result)))


main(stdin.readline, stdin.readlines)