Submission #899964

#	Time	Username	Problem	Language	Result	Execution time	Memory
899964		KN200711	Knapsack (NOI18_knapsack)	C++14	100 / 100	48 ms	3676 KiB

knapsack

# include <bits/stdc++.h>
# define ll long long
# define ld long double
# define fi first
# define se second
# define pll pair<ll, ll>
# define pdd pair<ld, ld>
# define pii pair<int, int>
using namespace std;

vector<pii> V[2001];
ll dp[2001];

int main() {
	int S, N;
	scanf("%d %d", &S, &N);
	for(int i=1;i<=N;i++) {
		int a, b, c;
		scanf("%d %d %d", &a, &b, &c);
		V[b].push_back({a, c});
	}
	for(int i=1;i<=S;i++) {
		sort(V[i].begin(), V[i].end());
		int cnt = 0;
		while(V[i].size() && cnt <= S / i) {
			pii G = V[i].back();
			V[i].back().se--;
			if(V[i].back().se == 0) V[i].pop_back();
			
			for(int d=S;d>=i;d--) {
				dp[d] = max(dp[d], dp[d - i] + G.fi);
			}
			cnt++;
		}
	}
	ll ans = 0ll;
	for(int i=0;i<=S;i++) ans = max(ans, dp[i]);
	printf("%lld\n", ans);
	return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |  scanf("%d %d", &S, &N);
      |  ~~~~~^~~~~~~~~~~~~~~~~
knapsack.cpp:19:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |   scanf("%d %d %d", &a, &b, &c);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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