Language: C++

#include <fstream>
#include <iostream>
#include <string>
#include <stdio>
#include <vector>
using namespace std;

#define READ_BY_TEXT false

vector<string> splitByDelimiter(string target, string delim) {
    std::string s = target;
    std::string delimiter = delim;
    size_t pos = 0;
    std::string token;
    vector<string> arr;
    while ((pos = s.find(delimiter)) != std::string::npos) {
        token = s.substr(0, pos);
        arr.push_back(token);
        s.erase(0, pos + delimiter.length());
    }
    arr.push_back(s);
    return arr;
}

int W, N;
int w[1000], v[1000];
int dp[1000][1000];
//vector<int> lines;
//int max_v, min_w;

int recursive(int i, int j) {
    
    if (dp[i][j] != -1) return dp[i][j];
    
    int ret;
    if (i >= N) {
        ret = 0;
    }
    else if (j < w[i]) {
        ret = recursive(i+1, j);
    }
    else {
        ret = max(recursive(i+1, j), recursive(i+1, j-w[i])+v[i]);
    }
    dp[i][j] = ret;
    
    return ret;
}

int calcMinWeight(int i, int j) {
    
    if (i >= N) {
        return 0;
    }
    
    int m_w = W;
    if (dp[i][j] == -1) {
        m_w = min(m_w, calcMinWeight(i+1, j));
    }
    else {
        m_w = min(m_w, calcMinWeight(i+1, j-w[i]) + w[i]);
    }
    
    return m_w;
}

int main() {
    
#if READ_BY_TEXT
    // Get values from test.txt
    std::ifstream ifs("test.txt");
    std::string str;
    if (ifs.fail())
    {
        std::cerr << "??±???" << std::endl;
        return -1;
    }
    getline(ifs, str);
    vector<string> words = splitByDelimiter(str, " ");
    num_d = stoi(words[0]);
    num_n = stoi(words[1]);
    for (int i=0; i<num_n; i++) {
        getline(ifs, str);
        lines.push_back(stoi(str));
    }
#else
    
    int case_v = 1;
    while (true) {
        cin >> W;
        if (!W) break;
        cin >> N;
        string input;
        for (int i = 0; i < N; i++) {
//            getline(cin, input);
            cin >> input;
            vector<string> words = splitByDelimiter(input, ",");
            v[i] = stoi(words[0]);
            w[i] = stoi(words[1]);
        }
        memset(dp, -1, sizeof(dp));
        
        // Solve
        int min_w = W;
        int max_v = recursive(0, W);
        for (int i = 0; i < N; i++) {
            for (int j = 0; j <= W; j++) {
//                cout << "dp[" << i << "][" << j << "] = " << dp[i][j] << endl;
                if (dp[i][j] == max_v) {
//                    cout << "i " << i << " j " << j << endl;
                    min_w = min(min_w, calcMinWeight(i, j));
//                    min_w = min(j, min_w);
                }
            }
        }
        
        cout << "Case " << case_v << ":" << endl;
        cout << max_v << endl;
        cout << min_w << endl;
        case_v++;
    }
    
//    string input;
//    getline(cin, input);
//    vector<string> words = splitByDelimiter(input, " ");
//    num_d = stoi(words[0]);
//    num_n = stoi(words[1]);
//    string input1;
//    for (int i=0; i<num_n; i++) {
//        getline(cin, input1);
//        lines.push_back(stoi(input1));
//    }
#endif
    
//    recursive(0, 0, "");
//    cout << result << endl;
    
    //    cout << "num_d = " << num_d << " num_n = " << num_n << "\n";
    //
    //    // Check parsed contents
    //    for (int i = 0; i < lines.size(); i++) {
    //        cout << "line[" << i << "] " << to_string(lines[i]) << "\n";
    //    }
    
    return 0;
}

Compiler output:
a.cc:4:10: fatal error: stdio: No such file or directory
    4 | #include <stdio>
      |          ^~~~~~~
compilation terminated.