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  1. #include <iostream>
  2. #include <vector>
  3. #include <functional>
  4. using namespace std;
  5.  
  6. void TEST(bool val, bool answer) {
  7.     string s_val = val ? "true" : "false";
  8.     string a_val = answer ? "true" : "false";
  9.     if(val == answer) {
  10.         cout << "PASS!" << endl;
  11.     } else {
  12.         cout << "FAIL: should be [ " << a_val << " ] but given [ " << s_val << " ]" << endl;
  13.     }
  14. }
  15.  
  16. class Iterator {
  17. public:
  18.     Iterator(const vector<int>& data) : _data(data) {}
  19.     int get_next() { return _data[_pointer++]; }
  20.     bool has_next() { return _pointer < _data.size(); }
  21. private:
  22.     vector<int> _data;
  23.     size_t _pointer{ 0 };
  24. };
  25.  
  26. /////////////////////////////////////////////////////////////////////////////////
  27.  
  28. bool one_dist(Iterator&& a, Iterator&& b) {
  29.     bool ins_a = false, ins_b = false, replace = false, diff = false;
  30.     char pre_a, pre_b;
  31.     while (a.has_next() && b.has_next()) {
  32.         int cur_a = a.get_next(), cur_b = b.get_next();
  33.         if (!ins_a && !ins_b && !replace) {
  34.             if (cur_a != cur_b) {
  35.                 ins_a = ins_b = replace = diff = true;
  36.             }
  37.         } else {
  38.             if (ins_a && pre_b != cur_a) ins_a = false;
  39.             if (ins_b && pre_a != cur_b) ins_b = false;
  40.             if (replace && cur_a != cur_b) replace = false;
  41.             if (!ins_a && !ins_b && !replace) return false;
  42.         }
  43.         pre_a = cur_a;
  44.         pre_b = cur_b;
  45.     }
  46.  
  47.     if (!a.has_next() && !b.has_next()) {
  48.         return !diff || replace;
  49.     } else if (a.has_next()) {
  50.         int cur_a = a.get_next();
  51.         return (!diff || (ins_a && pre_b == cur_a)) && !a.has_next();
  52.     } else if (b.has_next()) {
  53.         int cur_b = b.get_next();
  54.         return (!diff || (ins_b && pre_a == cur_b)) && !b.has_next();
  55.     }
  56. }
  57.  
  58. /////////////////////////////////////////////////////////////////////////////////
  59.  
  60. int main() {
  61. 	TEST(one_dist(Iterator({1,2}), Iterator({3,1})), false); // 0
  62. 	TEST(one_dist(Iterator({1,2}), Iterator({2,3})), false); // 0
  63. 	TEST(one_dist(Iterator({1,2,1}), Iterator({2,1})), true);
  64. 	TEST(one_dist(Iterator({1,2}), Iterator({2,1,2})), true);
  65. 	TEST(one_dist(Iterator({1,2,1,2,4}), Iterator({2,1,2,4})), true);
  66. 	TEST(one_dist(Iterator({1,2,3}), Iterator({1,2,4})), true); // 1
  67. 	TEST(one_dist(Iterator({1}), Iterator({2,3})), false); // 0
  68. 	TEST(one_dist(Iterator({1}), Iterator({2,1})), true); // 1
  69. 	TEST(one_dist(Iterator({2,3}), Iterator({1})), false); // 0
  70. 	TEST(one_dist(Iterator({1}), Iterator({1,2,3,4,5})), false); // 0
  71. 	TEST(one_dist(Iterator({1}), Iterator({})), true); // 1
  72. 	TEST(one_dist(Iterator({}), Iterator({1})), true); // 1
  73. 	TEST(one_dist(Iterator({1,2,3}), Iterator({2,3})), true); // 1
  74. 	TEST(one_dist(Iterator({1,3,4}), Iterator({2,3,4})), true); // 1
  75. 	TEST(one_dist(Iterator({1,2,3}), Iterator({2,4})), false); // 0
  76. 	TEST(one_dist(Iterator({1,2,3}), Iterator({2})), false); // 0
  77. 	TEST(one_dist(Iterator({3,4}), Iterator({5})), false); // 0
  78. 	TEST(one_dist(Iterator({3,4}), Iterator({5,6})), false); // 0
  79. 	TEST(one_dist(Iterator({1,2,3}), Iterator({1,2,3})), true); // 1
  80. 	TEST(one_dist(Iterator({}), Iterator({})), true); // 1
  81. 	TEST(one_dist(Iterator({1}), Iterator({2})), true); // 1
  82. 	TEST(one_dist(Iterator({1,3,4,5,6,7}), Iterator({1,2})), false); // 0
  83. 	TEST(one_dist(Iterator({1,3,4,5,6,7}), Iterator({1,4,5,6,7})), true); // 1
  84. 	TEST(one_dist(Iterator({2,3,4,5,6,7}), Iterator({3,4,5,6,7})), true); // 1
  85.  
  86. 	return 0;
  87. }
Success #stdin #stdout 0s 3280KB
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PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
PASS!
https://ideone.com/zfAq3R
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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