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#include <algorithm>
#include <fstream>
#include <iostream>
#include <string>
#include <tuple>
#include <vector>
using namespace std;
vector<tuple<int, int, int, int>>
read_file(string_view filename)
{
fstream input{ filename };
vector<tuple<int, int, int, int>> data;
for ( string line; getline(input, line); ) {
int a, b, c, d;
(void) sscanf(line.c_str(), "%d-%d,%d-%d", &a, &b, &c, &d);
data.emplace_back(a, b, c, d);
}
return data;
}
void
part1(const vector<tuple<int, int, int, int>>& data)
{
auto sum = count_if(begin(data), end(data), [](auto& tuple) {
const auto [a, b, c, d] = tuple;
return (a <= c && b >= d) || (c <= a && d >= b);
});
cout << sum << endl;
}
void
part2(const vector<tuple<int, int, int, int>>& data)
{
auto sum = count_if(begin(data), end(data), [](auto& tuple) {
const auto [a, b, c, d] = tuple;
return max(a, c) <= min(b, d);
});
cout << sum << endl;
}
int
main()
{
const auto data = read_file("data/day04.txt");
part1(data);
part2(data);
}
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