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Added part one of day four, plus a few 2020's from my laptop.

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This commit is contained in:
David Vereb 2021-12-06 22:32:30 -05:00
parent c426ab7008
commit e4ba946041
9 changed files with 1993 additions and 0 deletions
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#include <fstream>
#include <iostream>
#include <string>
#include <vector>
int find2(std::vector<int> &numbers)
{
for(auto i = 0; i < numbers.size(); ++i)
for(auto j = i + 1; j < numbers.size(); ++j)
if(numbers[i] + numbers[j] == 2020)
return numbers[i] * numbers[j];
return 0;
}
int find3(std::vector<int> &numbers)
{
for(auto i = 0; i < numbers.size(); ++i)
for(auto j = i + 1; j < numbers.size(); ++j)
for(auto k = i + 1; k < numbers.size(); ++k)
if(numbers[i] + numbers[j] + numbers[k] == 2020)
return numbers[i] * numbers[j] * numbers[k];
return 0;
}
int main()
{
std::ifstream ifs("data");
if(!ifs.is_open())
{
std::cerr << "Couldn't open file." << std::endl;
return -1;
}
std::vector<int> numbers;
for(std::string line; std::getline(ifs, line); )
numbers.push_back(std::atoi(line.c_str()));
std::cout << find2(numbers) << std::endl;
std::cout << find3(numbers) << std::endl;
return 0;
}

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a.out: main.cpp
clang++ -std=c++14 main.cpp -g -O0

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#include <algorithm>
#include <fstream>
#include <iostream>
#include <string>
// 6-7 w: wwhmzwtwwk
bool Valid1(const std::string &str)
{
int min, max;
char letter;
std::string password;
auto dash = str.find('-');
auto space = str.find(' ');
auto space_two = str.find(' ', space + 1);
min = std::atoi(str.substr(0, dash).c_str());
max = std::atoi(str.substr(dash + 1, space).c_str());
letter = str.at(space + 1);
password = str.substr(space_two + 1);
// std::cout << "min: " << min << std::endl
// << "max: " << max << std::endl
// << "letter: " << letter << std::endl
// << "pass: " << password << std::endl;
int total = std::count(password.begin(), password.end(), letter);
return (total >= min && total <= max);
}
bool Valid2(const std::string &str)
{
int min, max;
char letter;
std::string password;
auto dash = str.find('-');
auto space = str.find(' ');
auto space_two = str.find(' ', space + 1);
min = std::atoi(str.substr(0, dash).c_str());
max = std::atoi(str.substr(dash + 1, space).c_str());
letter = str.at(space + 1);
password = str.substr(space_two + 1);
bool a = password[min - 1] == letter;
bool b = password[max - 1] == letter;
return a != b;
}
int main()
{
std::ifstream ifs("data");
if(!ifs.is_open())
return -1;
int valid1 = 0;
int valid2 = 0;
for(std::string line; std::getline(ifs, line); )
{
if(Valid1(line))
++valid1;
if(Valid2(line))
++valid2;
}
std::cout << valid1 << " valid1 passwords." << std::endl;
std::cout << valid2 << " valid2 passwords." << std::endl;
return 0;
}

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# all the numbers called, in order
numbers = []
temp_board = []
boards = []
fills = []
board_index = 0
####
def Victory(board):
for y in range(0, len(board)):
if(board[y] == [True, True, True, True, True]):
return True;
# NOTE(dev): Assumes all columns are the same length
for x in range(0, len(board[0])):
num_true = 0
for y in range(0, len(board)):
if(board[y][x]):
num_true = num_true + 1
if(num_true == len(board[0])):
return True
return False
####
def FindWinner(numbers):
for i in range(0, len(numbers)):
for board_index in range(0, len(boards)):
for y in range(0, len(boards[board_index])):
for x in range(0, len(boards[board_index][y])):
if(boards[board_index][y][x] == numbers[i]):
fills[board_index][y][x] = True
if(Victory(fills[board_index])):
print('Victory with', numbers[i], 'on board', board_index, '!!')
return numbers[i], board_index
#### MAIN EXECUTION ####
with open('data', 'r') as fp:
for i,line in enumerate(fp):
if(i == 0):
numbers = line.strip().split(',')
elif(len(line.strip()) == 0):
if(len(temp_board) > 0): # i.e. skip the first, empty one
# add in the next player board
boards.append(temp_board)
temp_board = []
# create a blank answer board for this player board
for j in range(0,5):
temp_board.append([False, False, False, False, False])
fills.append(temp_board);
temp_board = []
board_index = board_index + 1
else:
# add the next array of numbers to the temporary board object
temp_board.append(line.strip().split())
winning_number,winning_board_index = FindWinner(numbers)
print('Winning Number:', winning_number, ', Winning Board Index: ', winning_board_index)
total = 0
for y in range(0, len(fills[winning_board_index])):
for x in range(0, len(fills[winning_board_index][y])): # assumes size is same for all columns
if(not fills[winning_board_index][y][x]):
total = total + int(boards[winning_board_index][y][x])
print(total * int(winning_number))
# # DEBUG(dev): Show full contents of all boards
# for x in range(0, len(boards)):
# for y in range(0, len(boards[x])):
# for z in range(0, len(boards[x][y])):
# print(boards[x][y][z])