56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
#include <iostream>
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#include <fstream>
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#include <string>
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#include <vector>
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#include <bitset>
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constexpr std::size_t bSize = 12;
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const std::vector<std::string>& readToString(const std::string& path);
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const void getGammaEpsilon(std::bitset<bSize>& g,
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std::bitset<bSize>& e,
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const std::vector<std::string>& v);
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int main()
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{
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std::vector<std::string> inputs = readToString("../input/03.txt");
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std::bitset<bSize> g, e;
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getGammaEpsilon(g, e, inputs);
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std::cout << (g.to_ulong() * e.to_ulong()) << std::endl;
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return 0;
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}
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const std::vector<std::string>& readToString(const std::string& path)
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{
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std::ifstream inputFile(path);
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std::string input;
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static std::vector<std::string> inputs;
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while(std::getline(inputFile, input))
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inputs.push_back(input);
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inputFile.close();
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return inputs;
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}
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const void getGammaEpsilon(std::bitset<bSize>& g,
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std::bitset<bSize>& e,
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const std::vector<std::string>& v)
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{
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int bitOccurence [bSize]{};
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for(const auto& el : v)
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for(int b = 0; b < bSize; b++)
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bitOccurence[b] += el[b] - 48;
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for(int b = 0; b < bSize; b++)
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g.set(bSize-b-1, bitOccurence[b] > v.size()/2);
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e = ~g;
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}
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