Submission #828853

#	Time	Username	Problem	Language	Result	Execution time	Memory
828853		raphaelp	Knapsack (NOI18_knapsack)	C++14	100 / 100	105 ms	7960 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int S, N;
    cin >> S >> N;
    vector<vector<int>> Tab(N, vector<int>(3));
    for (int i = 0; i < N; i++)
    {
        cin >> Tab[i][0] >> Tab[i][1] >> Tab[i][2];
    }
    sort(Tab.begin(), Tab.end());
    vector<vector<int>> Val(S + 1);
    for (int i = N - 1; i >= 0; i--)
    {
        while (Tab[i][2] && Val[Tab[i][1]].size() * Tab[i][1] <= S)
        {
            Val[Tab[i][1]].push_back(Tab[i][0]);
            Tab[i][2]--;
        }
    }
    vector<int> dp(S + 1);
    for (int i = 1; i <= S; i++)
    {
        for (int j = 0; j < Val[i].size(); j++)
        {
            for (int k = S - i; k >= 0; k--)
            {
                dp[k + i] = max(dp[k + i], dp[k] + Val[i][j]);
            }
        }
    }
    int ans = 0;
    for (int i = 0; i <= S; i++)
    {
        ans = max(ans, dp[i]);
    }
    cout << ans;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:16:63: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   16 |         while (Tab[i][2] && Val[Tab[i][1]].size() * Tab[i][1] <= S)
      |                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
knapsack.cpp:25:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |         for (int j = 0; j < Val[i].size(); j++)
      |                         ~~^~~~~~~~~~~~~~~

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