#!/bin/python

import sys

def initialize(s):
    # This function is called once before all queries.
    return
    

def answerQuery(l, r):
    # Return the answer for this query modulo 1000000007.
    return (l+r)/2
    
    

if __name__ == "__main__":
    s = raw_input().strip()
    initialize(s)
    q = int(raw_input().strip())
    for a0 in xrange(q):
        l, r = raw_input().strip().split(' ')
        l, r = [int(l), int(r)]
        result = answerQuery(l, r)
        print result