diff options
Diffstat (limited to 'other/restore_ip_addr.cpp')
-rw-r--r-- | other/restore_ip_addr.cpp | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/other/restore_ip_addr.cpp b/other/restore_ip_addr.cpp deleted file mode 100644 index eba5de2..0000000 --- a/other/restore_ip_addr.cpp +++ /dev/null @@ -1,56 +0,0 @@ -// 93. Restore IP Addresses -#include "leetcode.h" - -/* - * a valid ip address consists of exactly 4 integers separated by single dots - * each integer is between 0 and 255 (inclusive) and cannot have leading 0's - * given: string 's' containing only digits, return all possible valid ip - * addresses that can be formed by insert dots into 's'. digits cannot be - * reordered or removed. return addresses in any order. - */ - -class Solution { -public: - vector<string> restoreIpAddresses(string s) { - vector<string> ans; - string ip; - dfs(s, 0, 0, ip, ans); - return ans; - } - -private: - void dfs(string s, int start, int step, string ip, vector<string> &res) { - if (start == s.size() && step == 4) { - ip.erase(ip.end() - 1); - res.push_back(ip); - return; - } - if (s.size() - start > (4 - step) * 3) - return; - if (s.size() - start < (4 - step)) - return; - int num = 0; - for (int i = start; i < start + 3; i++) { - num = num * 10 + (s[i] - '0'); - if (num <= 255) { - ip += s[i]; - dfs(s, i + 1, step + 1, ip + '.', res); - } - if (num == 0) - break; - } - } -}; - -int main() { - Solution obj; - for (auto i : obj.restoreIpAddresses("25525511135")) - cout << i; // expect: 255.255.11.135","255.255.111.35 - cout << endl; - for (auto i : obj.restoreIpAddresses("0000")) - cout << i; // expect: 0.0.0.0 - cout << endl; - for (auto i : obj.restoreIpAddresses("101023")) - cout << i; // expect: 1.0.10.23,1.0.102.3,10.1.0.23,10.10.2.3,101.0.2.3 - cout << endl; -} |