int minDis(string & orgWord,string & desWord ,int step)
{
int ret;
if(record.find(desWord) != record.end() && record[desWord].find(orgWord) != record[desWord].end())
return record[desWord][orgWord];
if(orgWord.size() == 0 && desWord.size() == 0)
{
if(minSteps > step)
minSteps = step;
}
if(orgWord.size() == 0)
{
ret = desWord.size();
FillRecord(orgWord,desWord,ret);
return ret ;
}
if(desWord.size() == 0)
{
ret = orgWord.size();
FillRecord(orgWord,desWord,ret);
return ret;
}
if( step > minSteps)
return 1;
string orgWordSub = orgWord.size()==1?string(""): orgWord.substr(1);
string desWordSub = desWord.size()==1?string(""): desWord.substr(1);
if(orgWord[0] == desWord[0])
{
int doNoneSetps = minDis( orgWordSub,desWordSub,step);
ret =doNoneSetps;
FillRecord(orgWord,desWord,ret);
return ret;
}
else
{
int addSteps = minDis(orgWord,desWordSub,step+1) + 1;
int delSteps = minDis(orgWordSub,desWord,step+1) + 1;
int replaceSteps = minDis( orgWordSub,desWordSub,step+1) + 1;
ret = min(min(delSteps,addSteps),replaceSteps);
FillRecord(orgWord,desWord,ret);
return ret;
}
}
int bfs(int start, int end) {
vector<int> minDis(linkedList.size(), INT32_MAX);
vector<bool> visited(linkedList.size(), false);
queue<int> q;
q.push(start);
visited[start] = true;
minDis[start] = 0;
while(!q.empty()) {
int node = q.front();
q.pop();
for (int i = 0 ; i < linkedList[node].size(); i ++) {
int nb = linkedList[node][i];
if (!visited[nb]) {
q.push(nb);
visited[nb] = true;
minDis[nb] = minDis[node] + 1;
}
// This line is important: if minDis[nb] < minDis[node] + 1, it would be wrong to push node back
if (minDis[node] + 1 == minDis[nb]) previous[nb].push_back(node);
}
}
return minDis[end];
}
void MST::fill_greedy(vector<Block> &ans,bool *used)
{
int CC[X];
int a,bb,a1,b1;
minDis top;
int ind;
double matemp,ma;
for(int i=0;i<X;i++)
CC[i] = 0;
for(int i=0;i<X;i++)
{
a=i/N,bb=i%N;
for(int j=0;j<4;j++)
{
a1=a+xx[j],b1=bb+yy[j];
if(a1<0||a1>=N) continue;
if(b1<0||b1>=N) continue;
if(ans[a1*N+b1].idx!=-1)
CC[i]++;
}
}
priority_queue<minDis> Q;
for(int i=0;i<X;i++)
if(!used[ans[i].idx])
Q.push(minDis(CC[i],i));
while(Q.size())
{
top = Q.top();
Q.pop();
if(ans[top.id].idx!=-1)
continue;
ind=-1;
ma = 0;
for(int i=0;i<X;i++)
if(!used[i])
{
matemp=pieces->getWeight(ans,top.id,pieces->block[i]);
if(ind==-1||ma>matemp) ind=i,ma=matemp;
}
a=top.id/N,bb=top.id%N;
for(int j=0;j<4;j++)
{
a1=a+xx[j],b1=bb+yy[j];
if(a1<0||a1>=N) continue;
if(b1<0||b1>=N) continue;
if(ans[a1*N+b1].idx==-1)
{
CC[a1*N+b1]++;
Q.push(minDis(CC[a1*N+b1],a1*N+b1));
}
}
ans[top.id] = pieces->block[ind];
used[ind] =1;
}
}
int minDistance(string word1, string word2) {
// Start typing your C/C++ solution below
// DO NOT write int main() function
minSteps = -1;
return minDis(word1,word2,0);
}