2025aoc6.cpp

#include <iostream>
#include <fstream>
#include <sstream>

int main() {
    std::ifstream file("input.txt");
    std::string A, B, C, D, O;
    std::getline(file, A);
    std::getline(file, B);
    std::getline(file, C);
    std::getline(file, D);
    std::getline(file, O);

    unsigned long len = std::max({ A.size(), B.size(), C.size(), D.size(), O.size() }) + 1;
    A.resize(len, ' ');
    B.resize(len, ' ');
    C.resize(len, ' ');
    D.resize(len, ' ');
    O.resize(len, ' ');

    long long result1 = 0, result2 = 0;
    long long a1, b1, c1, d1;
    std::vector<long long> a2;
    char o;
    for (int i = 0; i < len; ++i) {
        if (A[i] == ' ' && B[i] == ' ' && C[i] == ' ' && D[i] == ' ') {
            if (o == '*') {
                result1 += a1 * b1 * c1 * d1;
                long long x = 1;
                for (int j = 0; j < a2.size(); ++j)
                    x *= a2[j];
                result2 += x;
            } else if (o == '+') {
                result1 += a1 + b1 + c1 + d1;
                for (int j = 0; j < a2.size(); ++j)
                    result2 += a2[j];
            }
            continue;
        }
        if (O[i] != ' ') {
            a1 = b1 = c1 = d1 = 0;
            a2.clear();
            o = O[i];
        }
        char ca = A[i], cb = B[i], cc = C[i], cd = D[i];
        long long x2 = 0;
        if (ca >= '0' && ca <= '9') {
            a1 = (ca - '0') + 10 * a1;
            x2 = (ca - '0') + 10 * x2;
        }
        if (cb >= '0' && cb <= '9') {
            b1 = (cb - '0') + 10 * b1;
            x2 = (cb - '0') + 10 * x2;
        }
        if (cc >= '0' && cc <= '9') {
            c1 = (cc - '0') + 10 * c1;
            x2 = (cc - '0') + 10 * x2;
        }
        if (cd >= '0' && cd <= '9') {
            d1 = (cd - '0') + 10 * d1;
            x2 = (cd - '0') + 10 * x2;
        }
        a2.push_back(x2);
    }

    std::cout << result1 << std::endl;
    std::cout << result2 << std::endl;

    return 0;
}