42 lines
No EOL
856 B
C++
42 lines
No EOL
856 B
C++
#include <fstream>
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#include <iostream>
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#include <string>
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#include <vector>
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using namespace std;
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int main()
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{
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vector<int> numbers;
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ifstream in("input.txt");
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while (true)
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{
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int tmp;
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in >> tmp;
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if (!in)
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break;
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numbers.push_back(tmp);
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cout << "read " << tmp << "\n";
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}
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cout << "Read " << numbers.size() << " numbers.\n";
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for (size_t outer = 0; outer < numbers.size(); ++outer)
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{
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for (size_t inner = outer + 1; inner < numbers.size(); ++inner)
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{
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for (size_t innest = inner + 1; innest < numbers.size(); ++innest)
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{
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if (numbers[outer] + numbers[inner] + numbers[innest] == 2020)
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cout << "Answer: " << numbers[outer] * numbers[inner] * numbers[innest] << "\n";
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}
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}
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}
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} |