179. Largest Number.ipynb

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    "179. Largest Number\n",
    "Given a list of non negative integers, arrange them such that they form the largest number.\n",
    "\n",
    "For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330.\n",
    "\n",
    "Note: The result may be very large, so you need to return a string instead of an integer.\n",
    "\n"
   ]
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      "9534330\n"
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    "class Solution:\n",
    "    # @param {integer[]} nums\n",
    "    # @return {string}\n",
    "    def largestNumber(self, nums):\n",
    "        nums=sorted(nums,key=functools.cmp_to_key(lambda x,y: 1 if str(y)+str(x)>str(x)+str(y) else -1))\n",
    "        s=\"\"\n",
    "        for i in nums:\n",
    "            s=s+str(i)\n",
    "        if s.replace('0','')=='':\n",
    "            return \"0\"\n",
    "        return s\n",
    "s1=Solution()\n",
    "print(s1.largestNumber([3,30,34,5,9]))"
   ]
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     "text": [
      "[9, 5, 34, 3, 30, 0]\n",
      "[34, 30, 9, 5, 3, 0]\n",
      "[3]\n"
     ]
    }
   ],
   "source": [
    "import functools\n",
    "a=[3,30,34,5,9,0]\n",
    "print(sorted(a,key=functools.cmp_to_key(lambda x,y: 1 if str(y)+str(x)>str(x)+str(y) else -1)))\n",
    "print(sorted(a,key=functools.cmp_to_key(lambda x,y: 1 if x<y else -1)))\n",
    "b=[3]\n",
    "print(sorted(b,key=functools.cmp_to_key(lambda x,y: 1 if str(y)+str(x)>str(x)+str(y) else -1)))"
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     "text": [
      "\n"
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   "source": [
    "print( '000'.replace('0',''))"
   ]
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     "text": [
      "False\n"
     ]
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   "source": [
    "print(\"a\">\"b\")"
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     "text": [
      "Help on built-in function sorted in module builtins:\n",
      "\n",
      "sorted(iterable, key=None, reverse=False)\n",
      "    Return a new list containing all items from the iterable in ascending order.\n",
      "    \n",
      "    A custom key function can be supplied to customise the sort order, and the\n",
      "    reverse flag can be set to request the result in descending order.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(sorted)"
   ]
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