60 lines
1.1 KiB
C++
60 lines
1.1 KiB
C++
#include <iostream>
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#include <fstream>
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#include <vector>
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int part_1();
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int part_2();
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int main() {
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part_1();
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part_2();
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}
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int part_1() {
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std::vector<int> vector;
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std::ifstream input("../input.txt");
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std::string line;
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while(std::getline(input, line)) {
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int num = std::stoi(line);
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vector.push_back(num);
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}
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for (int i : vector) {
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for (int j : vector) {
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if (i + j == 2020) {
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std::cout << (i * j) << std::endl;
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return 0;
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}
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}
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}
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return 1;
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}
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int part_2() {
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std::vector<int> vector;
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std::ifstream input("../input.txt");
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std::string line;
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while(std::getline(input, line)) {
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int num = std::stoi(line);
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vector.push_back(num);
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}
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for (int i : vector) {
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for (int j : vector) {
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for (int k : vector) {
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if (i + j + k == 2020) {
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std::cout << (i * j * k) << std::endl;
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return 0;
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}
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}
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}
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}
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return 1;
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}
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