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  1.  
  2.  
  3. #include <iostream>
  4. #include <string>
  5. #include <vector>
  6. using namespace std;
  7.  
  8. vector <string> split(string s, char p = '.') {
  9.     vector <string> result;
  10.  
  11.     string word = "";
  12.     s += p;
  13.  
  14.     for (char c : s) {
  15.         if (c == p) {
  16.             result.push_back(word);
  17.             word = "";
  18.         } else {
  19.             word += c;
  20.         }
  21.     }
  22.  
  23.     return result;
  24. }
  25.  
  26. bool check_if_num (string s) {
  27.     if (s.empty()) return false;
  28.  
  29.     for (char c : s) {
  30.         if (!isdigit(c)) {
  31.             return false;
  32.         }       
  33.     }
  34.  
  35.     return true;
  36. }
  37.  
  38. int count_dots(string s) {
  39.     int result = 0;
  40.  
  41.     for (char c : s) {
  42.         if (c == '.') {result++;}
  43.     }
  44.  
  45.     return result;
  46. }
  47.  
  48. int main() {
  49. 	cin.tie(nullptr);
  50. 	ios_base::sync_with_stdio(false);
  51.     string s;
  52.     cin >> s;
  53.     if (count_dots(s) != 3 || s[s.size() - 1] == '.') {
  54.         cout << "NO";
  55.         return 0;
  56.     }
  57.     for (string w : split(s)) {
  58.     	string copy_without_zero = "";
  59.     	for (char c : w) {if (c != '0') {copy_without_zero += c;}}
  60.  
  61.         if (copy_without_zero.size() > 3) {
  62.             cout << "Bad";
  63.             return 0;
  64.         } else if (!check_if_num(w)) {
  65.             cout << "Bad";
  66.             return 0;   
  67.         } 
  68.  
  69.         int num = stoi(w);
  70.  
  71.         if (num < 0 || num > 255) {
  72.             cout << "Bad";
  73.             return 0; 
  74.         }
  75.     }
  76.  
  77.     cout << "Good";
  78.  
  79.     return 0;
  80. }
Success #stdin #stdout 0.01s 5304KB
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https://ideone.com/3OhZfV
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

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