def tickets(people):
    #
    b=0
    c=0
    if b==0:
        for a in people:
            if a==25:
                b=b+1
            if a==50:
                b=b-1
                c=c+1
            if a==100:
                if b<3:
                    if ((b<1)or(c<1)):
                        return "NO"
                    else:
                        b=b-1
                        c=c-1
                else:
                    b=b-3
            if ((b<0)or(c<0)):
                return "NO"
    return"YES"