def main():
    a,b,c = list(map(int,input().split(' ')))
    #a,b,c = list(map(lambda x:abs(int(x)),input().split(' ')))
    # if (a**0.5 + b**0.5) < (c**0.5):
    #     print('Yes')
    # else:
    #     print('No')

    if c < 0:
        print('No')
        return
    if (4*a*b) < ((c-a-b)**2):
        print('Yes')
    else:
        print('No')

if __name__ == '__main__':
    main()
