Submission #490655

#	Time	Username	Problem	Language	Result	Execution time	Memory
490655		lolipop	Knapsack (NOI18_knapsack)	C++17	29 / 100	3 ms	332 KiB

knapsack

//looking for 49 points(subtasks 1 - 3)

#include<bits/stdc++.h>

using namespace std;

//#define int long long

using ll = long long;
using ii = pair <int, int>;

const int maxn = 1e5 + 5, maxk = 15, maxs = 2005, N = 2e8 + 5;

int n, s;
int V[maxn], W[maxn], K[maxs];
int dp[maxs];

main () {
  ios::sync_with_stdio(0); cin.tie(0);
#ifdef LOCAL
  freopen("in.txt", "r", stdin);
#endif
  cin >> s >> n;
  for (int i = 1; i <= n; ++i) {
    cin >> V[i] >> W[i] >> K[i];
  }
  int ans = 0;
  if (n == 1) {
    int take = s / W[1];
    ans = take > K[1] ? K[1] * V[1] : take * V[1];
    cout << ans;
    return 0;
  }
  for (int i = 1; i <= n; ++i) {
    for (int j = s; j >= W[i]; --j) {
      int take = s / W[i];
      if (take > K[i]) take = K[i];
      for (int k = take; k >= 0; --k) {
        dp[j] = max(dp[j], dp[j - W[i] * k] + V[i] * k);
        ans = max(ans, dp[j]);
      }
    }
  }
  cout << dp[s];
  return 0;
}
/*
array bound?
overflow?
print newline after every cases
idea correct?
*/

Compilation message (stderr)

knapsack.cpp:18:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   18 | main () {
      | ^~~~

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