Submission #629189

#	Time	Username	Problem	Language	Result	Execution time	Memory
629189		huyle	Knapsack (NOI18_knapsack)	C++17	73 / 100	366 ms	262144 KiB

knapsack

#include <bits/stdc++.h>
using i64 = long long;
#ifdef DEBUG
#include "debug.h"
#else
#define debug(...) 69
#endif
const i64 inf = 1e18;
int32_t main() {
  int s, n;
  scanf("%d %d", &s, &n);
  std::vector<int> v(n), w(n), k(n);
  for (int i = 0; i < n; ++i) {
    scanf("%d %d %d", &v[i], &w[i], &k[i]);
  }
  std::vector<std::vector<i64>> dp(n + 1, std::vector<i64>(s + 1, -inf));
  dp[0][0] = 0;
  for (int i = 0; i < n; ++i) {
    for (int d = 0; d <= k[i]; ++d) {
      i64 tmp = (i64)d * w[i];
      if (tmp > s)
        break;
      for (int j = (int)tmp; j <= s; ++j) {
        if (dp[i][j - tmp] == -inf)
          continue;
        dp[i + 1][j] = std::max(dp[i + 1][j], dp[i][j - tmp] + (i64)d * v[i]);
      }
    }
  }
  printf("%lld\n", *std::max_element(dp[n].begin(), dp[n].end()));
}

Compilation message (stderr)

knapsack.cpp: In function 'int32_t main()':
knapsack.cpp:11:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |   scanf("%d %d", &s, &n);
      |   ~~~~~^~~~~~~~~~~~~~~~~
knapsack.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     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