bool wordPattern(string &pattern, int i, string &str, int j, unordered_map<char,string>& myMap, unordered_set<string>& mySet){
if(i == pattern.length() && j == str.length()) return true;
if(i == pattern.length() || j == str.length()) return false;
char patCur = pattern[i];
if(myMap.find(patCur) != myMap.end()) {
string strCur = myMap[patCur];
int pos = strCur.length();
if(strCur != str.substr(j,pos))
return false;
return wordPattern(pattern,i+1,str,j+pos,myMap,mySet);
}
for(int pos = j; pos < str.length(); pos++) {
string strCur = str.substr(j, pos-j+1);
if(mySet.find(strCur) != mySet.end())
continue;
myMap[patCur] = strCur;
mySet.insert(strCur);
if(wordPattern(pattern, i+1, str, pos+1, myMap, mySet))
return true;
myMap.erase(patCur);
mySet.erase(strCur);
}
return false;
}
static void test1(void)
{
bool c;
char pattern[] = "abba";
char str[] = "dog cat cat dog";
c = wordPattern(pattern, str);
printf("%s\n", (c)? "true": "false");
}
static void test5(void)
{
bool c;
char pattern[] = "hut";
char str[] = "pig cat dog";
c = wordPattern(pattern, str);
printf("%s\n", (c)? "true": "false");
}
int
main()
{
int res = -1;
while (scanf("%s", pt) != EOF) {
getchar();
gets(st);
printf("pattern: %s\n", pt);
printf("str: %s\n", st);
res = wordPattern(pt, st);
printf("res = %d\n", res);
}
return 0;
}
int main(void)
{
char pattern[] = "adda";
char str[] = "dog cat cat dog";
printf("pattern:%s\n", pattern);
printf("str:%s\n", str);
bool result = wordPattern(pattern, str);
if (result)
printf("Yes!\n");
else
printf("No!\n");
return 0;
}
int main()
{
char pattern[10];
char str[1000];
int ret_val = 0;
memset(pattern,'\0',sizeof(pattern));
memset(str,'\0',sizeof(str));
printf("Enter the pattern:");
//fgets(pattern,sizeof(pattern),stdin);
gets(pattern);
printf("Enter the string:");
//fgets(str,sizeof(str),stdin);
gets(str);
ret_val = wordPattern(pattern,str);
if(ret_val) {
printf("string matches with pattern\n");
} else {
printf("string doesn't match with pattern\n");
}
return 0;
}
#include "Catch/single_include/catch.hpp"
#include "WordPattern.hpp"
TEST_CASE("WordPattern") {
REQUIRE(wordPattern("abba", "dog cat cat dog") == true);
REQUIRE(wordPattern("abba", "dog cat cat fish") == false);
REQUIRE(wordPattern("aaaa", "dog cat cat dog") == false);
REQUIRE(wordPattern("abba", "dog dog dog dog") == false);
}
bool wordPatternMatch(string pattern, string str) {
unordered_map<char,string> myMap;
unordered_set<string> mySet;
return wordPattern(pattern,0,str,0,myMap,mySet);
void main(void)
{
bool b;
b = wordPattern("abba", "dog cat cat dog");
b = wordPattern("abbc", "dog cat cat dog");
}