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#include <fstream>
#include <iostream>
#include <map>
#include <string>
#include <vector>
using namespace std;
vector<tuple<int, int>>
read_file(string_view filename)
{
fstream input{ filename };
vector<tuple<int, int>> data;
for ( string line; getline(input, line); ) {
data.emplace_back(line[0] - 'A' + 1, line[2] - 'X' + 1);
}
return data;
}
void
part1(const vector<tuple<int, int>>& lines)
{
map<int, int> wins{
{ 1, 2 },
{ 2, 3 },
{ 3, 1 }
};
static const int INC_DRAW = 3;
static const int INC_WIN = 6;
int score = 0;
for ( auto [a, b]: lines ) {
score += b;
if ( a == b ) {
score += INC_DRAW;
}
else if ( wins[a] == b ) {
score += INC_WIN;
}
}
cout << score << endl;
}
void
part2(const vector<tuple<int, int>>& lines)
{
map<int, int> wins{
{ 1, 2 },
{ 2, 3 },
{ 3, 1 }
};
map<int, int> loose{
{ 2, 1 },
{ 3, 2 },
{ 1, 3 }
};
static const int INC_DRAW = 3;
static const int INC_WIN = 6;
int score = 0;
for ( auto [a, b]: lines ) {
if (b == 2) {
score += a + INC_DRAW;
}
else if (b == 3) {
score += wins[a] + INC_WIN;
}
else {
score += loose[a];
}
}
cout << score << endl;
}
int
main()
{
auto lines = read_file("data/day02.txt");
part1(lines);
part2(lines);
}
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