AoC22/d01.cc

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

vector<unsigned> parse()
{
    vector<unsigned> elves;

    string line;
    unsigned elf = 0;
    while (getline(cin, line)) {
        if (line.empty()) {
            elves.push_back(elf);
            elf = 0;
            continue;
        }
        elf += stoul(line);
    }

    sort(elves.begin(), elves.end(), greater<int>());
    return elves;
}

unsigned p1(vector<unsigned> &input)
{
    return input[0];
}

unsigned p2(vector<unsigned> &input)
{
    return input[0] + input[1] + input[2];
}

int main()
{
    auto input = parse();
    cout << p1(input) << endl;
    cout << p2(input) << endl;
}