return v;
}
+struct FindP{
+ size_t p;
+ FindP(size_t p) : p(p) {}
+ bool operator()(Interval i){
+ return (i.first == p || i.second == p);
+ }
+};
+
+
int countCycles(const GeneOrder& go){
int cycles = 0;
set<size_t> marked;
- for (size_t p = 1; p < go.size() - 1; ++p){
+ vector<Interval> intervals = findIntervals(go);
+ vector<Interval> points = findIntervalsAtPoints(intervals);
+ for (size_t p = 1; p < go.size(); ++p){
if (marked.find(p) != marked.end())
continue;
+ Interval i = intervals[points[p].first];
+ while (marked.find(p) == marked.end()){
+ marked.insert(p);
+ if (i == intervals[points[p].first])
+ i = intervals[points[p].second];
+ else
+ i = intervals[points[p].first];
+
+ if (p == i.first)
+ p = i.second;
+ else
+ p = i.first;
+ }
+ ++cycles;
}
return cycles;
}
return vector<Component>();
}
-//TODO: Think of a better than O(n^2) implementation
+/**
+ *
+ */
std::vector<Interval> findIntervals(const GeneOrder& go){
- vector<Interval> intervals;
- for (size_t i = 0; i < go.size() - 1; ++i){
+ vector<Interval> intervals(go.size()-1,Interval(go.size(),go.size()));
+ size_t n = 0;
+ for (GeneOrder::iterator g = go.begin(); g != go.end(); ++g, ++n){
+ size_t i = abs(*g);
+ if (i < go.size() - 1)
+ intervals[i].first = n + (*g >= 0 ? 1 : 0);
+ if (i > 0)
+ intervals[i-1].second = n + (*g < 0 ? 1 : 0);
+ }
+ return intervals;
+}
+
+/**
+ * TODO: Think of a better than O(n^2) implementation.
+ * Possibly move to cache result
+ */
+std::vector<Interval> findIntervalsAtPoints(const vector<Interval>& intervals){
+ vector<Interval> points;
+ points.push_back(Interval(intervals.size(),intervals.size())); //Dummy interval to match point and index
+ for (size_t p = 1; p <= intervals.size(); ++p){
size_t f = 0;
size_t s = 0;
bool found = false;
size_t n = 0;
- for (GeneOrder::iterator g = go.begin(); g != go.end(); ++g, ++n){
- if (static_cast<size_t>(abs(*g)) == i){
- f = n;
- if (*g >= 0)
- ++f;
- if (found)
+ for (vector<Interval>::const_iterator i = intervals.begin(); i != intervals.end(); ++i, ++n){
+ if (i->first == p){
+ if (!found){
+ f = n;
+ found = true;
+ }else{
+ s = n;
break;
- found = true;
+ }
}
- if(static_cast<size_t>(abs(*g)) == i+1){
- s = n;
- if (*g < 0)
- ++s;
- if (found)
+ if (i->second == p){
+ if (!found){
+ f = n;
+ found = true;
+ }else{
+ s = n;
break;
- found = true;
+ }
}
}
- intervals.push_back(Interval(f,s));
+ points.push_back(Interval(f,s));
}
- return intervals;
+ return points;
+
}