interviews/training->training

puzzles/training/a_bit_more_complex_wildcard_match.cpp

@@ -0,0 +1,121 @@
+/*
+VIM: let b:lcppflags="-std=c++14 -O2 -pthread -I."
+VIM: let b:wcppflags="/O2 /EHsc /DWIN32"
+VIM-: let b:argv=""
+*/
+#include <map>
+#include <set>
+#include <list>
+#include <cmath>
+#include <ctime>
+#include <deque>
+#include <queue>
+#include <stack>
+#include <string>
+#include <bitset>
+#include <cstdio>
+#include <limits>
+#include <vector>
+#include <climits>
+#include <cstring>
+#include <cstdlib>
+#include <fstream>
+#include <numeric>
+#include <sstream>
+#include <iostream>
+#include <algorithm>
+#include <unordered_map>
+
+using namespace std;
+
+/*
+ * Complete the function below.
+ */
+bool match(const string& pattern, const string& string) {
+
+    auto s = string.begin();
+    auto p = pattern.begin();
+
+    const std::string::const_iterator empty;
+    auto prev_p = empty;
+    auto prev_s = s;
+    while (s != string.end()) {
+        while ( p != pattern.end() && *p == '*' ) {
+            p++;
+            prev_p = p;
+            prev_s = s;
+        }
+        if ( p == pattern.end() ) {
+            if ( prev_p == p ){
+                return true;
+            } else if ( prev_p != empty ) {
+                p = prev_p;
+                s = ++prev_s;
+            } else {
+                return false;
+            }
+        }
+        else if ( *s == *p ){
+            s++;
+            p++;
+        }
+        else if ( *p == '?' ){
+            s++;
+            p++;
+        }
+        else if ( prev_p != empty ) {
+            p = prev_p;
+            s = ++prev_s;
+        }
+        else {
+            return false;
+        }
+    }
+    while ( *p == '*' ) {
+        p++;
+    }
+    return p == pattern.end();
+}
+
+
+void test( const std::string& str, const std::string& pattern ){
+    bool res = match(pattern, str);
+    std::cout << str << " - " << pattern << " -> " << res <<std::endl;
+}
+
+int main() {
+    
+#if 1
+    test( "", "" );
+    test( "", "*" );
+    test( "", "?" );
+    test( "a", "?" );
+    test( "abc", "abc" );
+    test( "aaaaabc", "*abc" );
+    test( "aaaaabc", "a*bc" );
+    test( "aaaaabc", "*abc*" );
+    test( "abc", "*abc*" );
+    test( "abc", "****abc*" );
+    test( "abcabaabcabacabc", "a*ba*c" );
+    test( "abcabcabcabccabc", "a*b*cc" );
+    test( "abcabcabcabccabc", "a*b*c?" );
+    test( "abcabcabcabccabc", "a*b*b?*" );
+    test( "abcabcabcabccabc", "*a*?*c*" );
+    test( "abcabcabcabccabc", "****a****??????*c******" );
+#else
+    ofstream fout(getenv("OUTPUT_PATH"));
+    bool res;
+    string _pattern;
+    getline(cin, _pattern);
+    
+    string _string;
+    getline(cin, _string);
+    
+    res = match(_pattern, _string);
+    fout << res << endl;
+    
+    fout.close();
+#endif
+    return 0;
+}
+