79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
#include <iostream>
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#include <string>
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#include <vector>
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#include <set>
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#include <utility>
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using namespace std;
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set<pair<int,int>> flip_about(set<pair<int,int>> input_points, bool x_flip, int value);
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int main(int argc, char* argv[])
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{
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string line;
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bool coord_input = true;
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set<pair<int,int>> coords;
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vector<pair<bool,int>> folds;
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while(getline(cin, line))
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{
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if (0 == line.size())
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{
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coord_input = false;
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continue;
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}
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if (coord_input)
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{
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string::size_type n = line.find(',');
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pair<int,int> coord(stoi(line.substr(0,n)), stoi(line.substr(n+1)));
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coords.insert(coord);
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}
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else
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{
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string::size_type n = line.find_last_of(' ');
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line = line.substr(n+1);
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pair<bool,int> fold(line[0]=='x', stoi(line.substr(2)));
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folds.push_back(fold);
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}
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}
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coords = flip_about(coords, folds[0].first, folds[0].second);
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cout << coords.size() << endl;
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}
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set<pair<int,int>> flip_about(set<pair<int,int>> input_points, bool x_flip, int value)
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{
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set<pair<int,int>> output_points;
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set<pair<int,int>>::iterator it = input_points.begin();
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for(; it != input_points.end(); ++it)
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{
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if (x_flip)
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{
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if (it->first > value)
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{
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pair<int,int> flipped_coord(2*value-it->first, it->second);
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output_points.insert(flipped_coord);
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}
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else
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{
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output_points.insert(*it);
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}
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}
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else
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{
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if (it->second > value)
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{
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pair<int,int> flipped_coord(it->first, 2*value-it->second);
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output_points.insert(flipped_coord);
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}
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else
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{
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output_points.insert(*it);
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}
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}
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}
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return output_points;
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} |