Submission #543716

#	Time	Username	Problem	Language	Result	Execution time	Memory
543716		zammy	Knapsack (NOI18_knapsack)	C++17	0 / 100	107 ms	262144 KiB

knapsack

#include <bits/stdc++.h>
#define int long long
using namespace std;

const int inf = INT_MAX, mod = 1e9 + 7, MAX_N = (1e5), MAX_S = 2000;
int dp[MAX_N + 1][MAX_S + 1];

void solve()
{
    int S, N;
    cin >> S >> N;
    vector<int> V(N + 1), W(N + 1), K(N + 1);
    for (int i = 1; i <= N; i++)
        cin >> V[i] >> W[i] >> K[i];
    for (int i = 1; i <= N; i++)
    {
        for (int j = 1; j <= S; j++)
        {
            dp[i][j] = dp[i - 1][j];
            for (int k = 1; k <= K[i]; k++)
            {
                int wt = W[i] * k;
                if (j - wt < 0)
                    break;
                dp[i][j] = max(dp[i][j], (V[i] * k) + dp[i - 1][j - wt]);
            }
        }
    }
    cout << dp[N][S] << "\n";
}

int32_t main()
{
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout << fixed;
    cout << setprecision(9);
    int tt = 1;
    // cin >> tt;
    for (int i = 1; i <= tt; i++)
    {
        // cout << "Case #" << i << ": ";
        solve();
    }
    cerr << "time taken : " << (float)clock() / CLOCKS_PER_SEC << " secs" << endl;
}

Compilation message (stderr)

knapsack.cpp: In function 'int32_t main()':
knapsack.cpp:35:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:36:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 12
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 24
• Subtask 5: 0 / 27