44 lines
952 B
C++
44 lines
952 B
C++
//
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// Created by Matthew Gretton-Dann on 03/12/2021.
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//
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#include <cassert>
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#include <iostream>
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#include <string>
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#include <vector>
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auto main() -> int
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{
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std::vector<unsigned> bit_counts;
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std::string line;
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unsigned line_count{0};
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while (std::getline(std::cin, line)) {
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++line_count;
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if (bit_counts.empty()) {
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bit_counts.resize(line.size(), 0);
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}
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assert(bit_counts.size() == line.size());
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for (std::size_t i{0}; i < line.size(); ++i) {
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if (line[i] == '1') {
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bit_counts[i]++;
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}
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}
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}
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std::uint64_t gamma_rate{0};
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std::uint64_t epsilon_rate{0};
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for (auto count : bit_counts) {
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gamma_rate <<= 1;
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epsilon_rate <<= 1;
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if (count > line_count / 2) {
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gamma_rate |= 1;
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}
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else {
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epsilon_rate |= 1;
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}
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}
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std::cout << "Gamma rate * epsilon rate = " << gamma_rate << " * " << epsilon_rate << " = "
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<< gamma_rate * epsilon_rate << '\n';
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return 0;
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} |