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56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
#include <algorithm>
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#include <iostream>
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#include <list>
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#include <string>
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#include <tuple>
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#include <vector>
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int main()
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{
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std::vector<std::pair<char, int>> steps;
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while (1) {
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std::string line;
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std::getline(std::cin, line);
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if (std::cin.eof())
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break;
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steps.emplace_back(line.front(), stoi(line.substr(2)));
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}
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int hx = 0, hy = 0, tx = 0, ty = 0;
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std::list<std::pair<int, int>> locs;
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locs.emplace_back(0, 0);
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for (const auto& [dir, count] : steps) {
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for (int i = 0; i < count; ++i) {
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//std::cout << hx << ", " << hy << " " << tx << ", " << ty << std::endl;
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if (dir == 'U')
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++hy;
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else if (dir == 'D')
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--hy;
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else if (dir == 'R')
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++hx;
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else if (dir == 'L')
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--hx;
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if (std::abs(hx - tx) > 1 || std::abs(hy - ty) > 1) {
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if (hx != tx)
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tx += hx > tx ? 1 : -1;
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if (hy != ty)
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ty += hy > ty ? 1 : -1;
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if (std::find(locs.cbegin(), locs.cend(), std::pair{tx, ty}) == locs.cend()) {
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locs.emplace_back(tx, ty);
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}
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}
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}
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}
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std::cout << locs.size() << std::endl;
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return 0;
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}
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