def main():

    inp = [input() for i in range(3)]
    

    long = [int(inp[0]), int(inp[1])]

    count1 = 0
    K1 = [int(0), int(inp[2])]
    for (i, j) in zip(long, K1):
        g1 = i -j
        count1 = count1 + 1
        if g1 <= 0:
            break

    count2 = 0
    K2 = [int(inp[2]), int(0)]
    for (i, j) in zip(long, K2):
        g2 = i - j
        count2 = count2 + 1
        if g2 <= 0:
            break

    if inp[0] == 0: 
        a = 0
    else:
        a = 1
    
    if inp[1] == 0:
        b = 0
    else:
        b = 1
    
    ans = count1 + count2 + a + b
    print(ans)


if __name__ == '__main__':
    main()