75 lines
1.4 KiB
C++
75 lines
1.4 KiB
C++
#include "aoc.hpp"
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#include <algorithm>
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#include <unordered_map>
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class Day01 : public AOCDay
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{
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public:
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Day01() {}
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~Day01() {}
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int Day() override {return 1;}
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int dial = 50;
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void RotateDial(int diff)
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{
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dial = (dial + diff) % 100;
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if (dial < 0) dial += 100;
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}
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int PartOne(File& f) override
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{
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f.SplitByIndex(1);
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dial = 50;
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int res = 0;
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for (const auto& lineTokens : f)
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{
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char direction = (char)lineTokens[0].Data[0];
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int amount = std::stoi(lineTokens[1].Data);
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if (direction == 'L')
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{
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amount = -amount;
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}
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RotateDial(amount);
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if (dial == 0) res++;
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}
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return res;
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}
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int PartTwo(File& f) override
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{
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f.SplitByIndex(1);
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dial = 50;
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int res = 0;
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for (const auto& lineTokens : f)
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{
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char direction = (char)lineTokens[0].Data[0];
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int amount = std::stoi(lineTokens[1].Data);
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int dir = 1;
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if (direction == 'L')
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{
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dir = -1;
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}
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while (amount > 0)
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{
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RotateDial(dir);
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if (dial == 0) res++;
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amount--;
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}
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}
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return res;
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}
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};
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ADD_AOC_DAY(Day01);
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