95 lines
2.9 KiB
C++
95 lines
2.9 KiB
C++
/*******************************************************************************
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*
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* Copyright (c) 2020 Gnarwhal
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*
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* -----------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files(the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*******************************************************************************/
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#include <vector>
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#include <string>
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#include <iostream>
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#include <fstream>
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#include "types.hpp"
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struct Password {
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u32 min;
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u32 max;
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char c;
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std::string password;
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};
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auto extract_num(usize & index, const std::string & string) -> u32 {
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auto num = u32(0);
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--index;
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while ('0' <= string[++index] && '9' >= string[index]) {
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num = (num * 10) + (string[index] - '0');
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}
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return num;
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}
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auto count_valid_sled(const std::vector<Password> & passwords) -> u32 {
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auto valid = u32(0);
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for (auto password : passwords) {
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auto count = u32(0);
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for (auto c : password.password) {
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if (c == password.c) {
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++count;
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}
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}
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valid += (password.min <= count && count <= password.max);
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}
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return valid;
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}
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auto count_valid_toboggan(const std::vector<Password> & passwords) -> u32 {
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auto valid = u32(0);
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for (auto password : passwords) {
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if ((password.password[password.min - 1] == password.c)
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^ (password.password[password.max - 1] == password.c)) {
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++valid;
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}
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}
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return valid;
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}
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auto main(i32 argc, char * argv[]) -> i32 {
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auto passwords = std::vector<Password>();
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{
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auto line = std::string();
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auto file = std::ifstream("day2.input");
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while (getline(file, line)) {
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auto index = usize(0);
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auto password = Password{};
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password.min = extract_num( index, line);
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password.max = extract_num(++index, line);
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password.c = line[++index];
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password.password = line.substr(index + 3, line.size() - index - 3);
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passwords.push_back(password);
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}
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}
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std::cout << count_valid_sled(passwords) << std::endl;
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std::cout << count_valid_toboggan(passwords) << std::endl;
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return 0;
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}
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