408

Author: yubinbai

README.org

@@ -2,6 +2,7 @@ Leetcode solutions in C++, Java, Python
 
 | Number | Title                                                                                                                                                | Difficulty |
 |--------+------------------------------------------------------------------------------------------------------------------------------------------------------+------------|
+|    408 | [[./src/408_valid_word_abbreviation][Valid Word Abbreviation]]                                                                                       | Medium     |
 |    407 | [[./src/407_trapping_rain_water_ii][Trapping Rain Water II]]                                                                                         | Hard       |
 |    406 | [[./src/406_queue_reconstruction_by_height][Queue Reconstruction by Height]]                                                                         | Medium     |
 |    405 | [[./src/405_convert_a_number_to_hex][Convert a Number to Hexadecimal]]                                                                               | Easy       |

src/408_valid_word_abbreviation/Makefile

@@ -0,0 +1,3 @@
+all:
+	clang++ main.cpp -o main.o -std=c++11
+	./main.o

src/408_valid_word_abbreviation/README.md

@@ -0,0 +1,27 @@
+Problem
+===
+408. Valid Word Abbreviation
+Problem:
+Given a non-empty string s and an abbreviation abbr, return whether the string matches with the given abbreviation.
+
+A string such as "word" contains only the following valid abbreviations:
+
+["word", "1ord", "w1rd", "wo1d", "wor1", "2rd", "w2d", "wo2", "1o1d", "1or1", "w1r1", "1o2", "2r1", "3d", "w3", "4"]
+Notice that only the above abbreviations are valid abbreviations of the string "word". Any other string is not a valid abbreviation of "word".
+
+Note: Assume s contains only lowercase letters and abbr contains only lowercase letters and digits.
+
+Example 1:
+
+Given s = "internationalization", abbr = "i12iz4n":
+
+Return true.
+Example 2:
+
+Given s = "apple", abbr = "a2e":
+
+Return false.
+
+Solution
+===
+String iteration

src/408_valid_word_abbreviation/main.cpp

@@ -0,0 +1,80 @@
+#include <cstdlib>
+#include <iostream>
+#include <list>
+#include <map>
+#include <queue>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+using namespace std;
+
+
+class Solution {
+public:
+  bool validWordAbbreviation(string word, string abbr) {
+    int i = 0, j = 0;
+    int iter = 0;
+    while (i < word.size() && j < abbr.size()) {
+      if (abbr[j] >= '0' && abbr[j] <= '9') {
+        if (abbr[j] == '0' && iter == 0) {
+          return false;
+        }
+        while (j < abbr.size() && abbr[j] >= '0' && abbr[j] <= '9') {
+          iter = 10 * iter + abbr[j] - '0';
+          j++;
+        }
+        if (iter == 0) {
+          return false;
+        } else {
+          i += iter;
+          iter = 0;
+        }
+        if (iter != 0) {
+          return false;
+        }
+      } else {
+        if (word[i] == abbr[j]) {
+          i++;
+          j++;
+        } else {
+          return false;
+        }
+      }
+    }
+    return i == word.size() && j == abbr.size();
+  }
+};
+
+int main(int argc, const char * argv[]) {
+  Solution sol;
+  string s, abbr;
+
+  s = "internationalization", abbr = "i12iz4n";
+  cout << sol.validWordAbbreviation(s, abbr) << endl;
+
+  s = "apple", abbr = "a2e";
+  cout << sol.validWordAbbreviation(s, abbr) << endl;
+
+  s = "word", abbr = "4";
+  cout << sol.validWordAbbreviation(s, abbr) << endl;
+
+  s = "word", abbr = "45";
+  cout << sol.validWordAbbreviation(s, abbr) << endl;
+
+  s = "word", abbr = "wo0rd";
+  cout << sol.validWordAbbreviation(s, abbr) << endl;
+
+  s = "word", abbr = "wo0rd";
+  cout << sol.validWordAbbreviation(s, abbr) << endl;
+
+  s = "word", abbr = "wo01d";
+  cout << sol.validWordAbbreviation(s, abbr) << endl;
+
+  s = "word", abbr = "word";
+  cout << sol.validWordAbbreviation(s, abbr) << endl;
+
+  return 0;
+}