#include <iostream> #include <vector> #include <algorithm> #include <map> #include <set> #include <cmath> #include <numeric> #include <queue> #include <stack> #include <iomanip> using namespace std; void baseIO(string s = ""){ ios_base::sync_with_stdio(0); cin.tie(0); if (s.size()){ freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); } } int main() { baseIO(); int s, n; cin >> s >> n; vector<vector<int>> items(n, vector<int>(3)); vector<pair<int, int>> ai; for (int i = 0; i < n; i++){ cin >> items[i][0] >> items[i][1] >> items[i][2]; while (items[i][2]--) ai.push_back({items[i][0], items[i][1]}); } int dp[s + 1]{}; for (auto &item : ai){ for (int pos = s - item.second; pos >= 0; pos--){ dp[pos + item.second] = max(dp[pos + item.second], dp[pos] + item.first); } } cout << *max_element(dp, dp + s + 1); return 0; }

knapsack.cpp: In function 'void baseIO(std::string)':
knapsack.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen((s + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen((s + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~