Submission #464292

#	Time	Username	Problem	Language	Result	Execution time	Memory
464292		vbee	Knapsack (NOI18_knapsack)	C++14	73 / 100	1094 ms	1420 KiB

knapsack

#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define ii pair<int,int>
#define vii vector<ii>
#define vi vector<int>
#define fi first
#define se second
#define TASK ""
#define ll long long
#define pll pair<ll, ll>
#define vll vector<ll>
#define vpll vector<pll>
#define pb push_back
#define MASK(i) (1 << (i))
#define BIT(x, i) ((x >> (i)) & 1)

using namespace std;

const int oo = 1e9 + 7;
const ll loo = (ll)1e18 + 7;
const int N = 1e5 + 1;
const int S = 2001;
int dp[S], newdp[S], w[N], v[N], k[N], n, s;
void maximize(int &a, int b){
	if (a < b) a = b;
}
int main() {
	scanf("%d%d", &s, &n);
	for (int i = 1; i <= n; i++) scanf("%d%d%d", &v[i], &w[i], &k[i]);
	for (int i = 0; i < n; i++){
		for (int sum = 0; sum <= s; sum++){
			for (int z = 0; z <= k[i + 1]; z++){
				if (sum + w[i + 1] * z > s) break;
				maximize(dp[sum + w[i + 1] * z], newdp[sum] + v[i + 1] * z);
			}
			swap(dp[sum], newdp[sum]);
			dp[sum] = 0;
		}
	}
	int res = 0;
	for (int i = 0; i <= s; i++) maximize(res, newdp[i]);
	printf("%d", res);
	return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:29:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |  scanf("%d%d", &s, &n);
      |  ~~~~~^~~~~~~~~~~~~~~~
knapsack.cpp:30:36: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |  for (int i = 1; i <= n; i++) scanf("%d%d%d", &v[i], &w[i], &k[i]);
      |                               ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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