Submission #674566

#	Time	Username	Problem	Language	Result	Execution time	Memory
674566		omikron123	Knapsack (NOI18_knapsack)	C++14	37 / 100	1063 ms	1832 KiB

knapsack

// https://oj.uz/problem/view/NOI18_knapsack

#include <cstdio>
#include <algorithm>
#include <functional>
#include <vector>
#include <cstring>
using namespace std;
typedef long long ll;

// 0-k背包问题

// n <= 1e5, s <= 2000
int n, s;
int v[100005], w[100005], K[100005];   // v[] <= 1e6
ll dp[100005][2005];       // dp[i][j], max value achieved with items 1..i and weight j

int main() {
    scanf("%d %d", &s, &n);
    for (int i = 1; i <= n; i++)
        scanf("%d %d %d", &v[i], &w[i], &K[i]);

    dp[0][0] = 0;
    for (int i = 1; i <= n; i++)
        for (int j = 0; j <= s; j++)
            for (int k = 0; k <= K[i]; k++)
                if (j-w[i]*k >= 0)
                    dp[i][j] = max(dp[i][j], dp[i-1][j-w[i]*k] + v[i]*k);
    ll ans = 0;
    for (int i = 0; i <= s; i++)
        ans = max(ans, dp[n][i]);
    printf("%lld", ans);

    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     scanf("%d %d", &s, &n);
      |     ~~~~~^~~~~~~~~~~~~~~~~
knapsack.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         scanf("%d %d %d", &v[i], &w[i], &K[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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