import math
import sys

def main():
    input = sys.stdin.read().split()
    n = int(input[0])
    idx = 1
    for _ in range(n):
        a = int(input[idx])
        b = int(input[idx + 1])
        idx += 2
        
        sqrt_a = math.isqrt(a)
        a_square = (sqrt_a * sqrt_a == a)
        sqrt_b = math.isqrt(b)
        b_square = (sqrt_b * sqrt_b == b)
        
        if a_square and b_square:
            print(sqrt_a + sqrt_b + 1)
        else:
            s = math.sqrt(a) + math.sqrt(b)
            print(math.ceil(s))
    
if __name__ == '__main__':
    main()