import math

def checkTriangular(num):
    return (math.sqrt(8*num+1)-1)%2==0
 
def checkpentagonal(num):
    return (math.sqrt(24*num+1)+1)%6==0
    
def checkhexagonal(num):
    return (math.sqrt(8*num+1)+1)%4==0
    
n,a,b=map(int,input().split(" "))
if a==3 and b==5:
    for i in range(1,n):
        if checkTriangular(i) and checkpentagonal(i):
            print(i)
            
else:   
    for i in range(1,n):
        if checkpentagonal(i)and checkhexagonal(i):
            print(i)