Given an integer, return its base 7 string rePResentation.
Example 1:
Input: 100Output: "202"Example 2:
Input: -7Output: "-10"Note: The input will be in range of [-1e7, 1e7].
class Solution {public: string convertToBase7(int num) { int symbol = 1; string ans; if(num < 0){ num = -num; symbol = -1; } else if(num == 0) return "0"; while(num){ char rem = num % 7 + '0'; ans.insert(0, 1, rem); num /= 7; } if(symbol == -1) ans.insert(0, "-"); return ans; }};新闻热点
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