AoC22/d01.cc

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

using namespace std;

typedef vector<unsigned> Input;

Input parse()
{
    Input elves;

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

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

unsigned p1(Input &input)
{
    return input[0];
}

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

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