hw5
Never
#include<iostream> #include<vector> #include<string> struct Fruit { std::string name; std::vector<int> hyperFeatures; int last_hyper; // to remember tha last used hyper number }; struct GradBinHyperWeight { int featureIdx; double gradSlider; int binThreshold; GradBinHyperWeight *backwardContinuation = nullptr; GradBinHyperWeight *forwardContinuation = nullptr; bool shouldBackward(Fruit& f) const { return f.hyperFeatures[featureIdx] < binThreshold; } void applyGradSlider(Fruit& f) const { f.hyperFeatures[featureIdx] = (int) ((double) f.hyperFeatures[featureIdx] * gradSlider); } }; // insert node in order to build a tree void InsertNode(GradBinHyperWeight* root,GradBinHyperWeight* g){ // to bigger than root if(g->binThreshold>=root->binThreshold){ // if right child already exist than recur again using right child as root if(root->forwardContinuation!=NULL) InsertNode(root->forwardContinuation,g); // if right child hasn't exist then insert else root->forwardContinuation = g; } // if smaller than root else{ // same as above if(root->backwardContinuation!=NULL) InsertNode(root->backwardContinuation,g); else root->backwardContinuation = g; } } std::vector<Fruit> Sort(std::vector<Fruit> f,GradBinHyperWeight* root){ std::vector<Fruit> left; std::vector<Fruit> right; // first use garde slider, and split array to left and right part for(auto i:f){ root->applyGradSlider(i); if(root->shouldBackward(i)) left.insert(left.end(),i); else right.insert(right.end(),i); } if(left.size()==0) return left; // if empty, then return an empty vector else if(left.size()==1){ // if only one elment, then get "last_hyper" left.begin()->last_hyper = left.begin()->hyperFeatures[root->featureIdx]; } else left = Sort(left,root->backwardContinuation); // if more than one element then sort again // same as above if(right.size()==0) return right; else if(right.size()==1){ right.begin()->last_hyper = right.begin()->hyperFeatures[root->featureIdx]; } else right = Sort(right,root->forwardContinuation); // merge right to left for(auto i:right) left.insert(left.end(),i); return left; } int main(){ int N,M,tmp; std::cin >> N >> M; std::vector<Fruit> fruit; while(N--){ Fruit f; std::cin >> f.name; for(int i=0;i<M;i++){ std::cin >> tmp; (f.hyperFeatures).insert(f.hyperFeatures.end(),tmp); } fruit.insert(fruit.end(),f); } GradBinHyperWeight* root = new GradBinHyperWeight; std::cin >> M; std::cin >> root->featureIdx >> root->gradSlider >> root->binThreshold; while(M--&&M>=1){ GradBinHyperWeight* node = new GradBinHyperWeight; std::cin >> node->featureIdx >> node->gradSlider >> node->binThreshold; InsertNode(root,node); } fruit = Sort(fruit,root); for(auto i:fruit) std::cout << i.name << " " << i.last_hyper << std::endl; return 0; }
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