제출 #924969

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
924969		doducanh	Knapsack (NOI18_knapsack)	C++14	100 / 100	47 ms	7248 KiB

knapsack

#include <bits/stdc++.h>

using namespace std;

typedef vector<pair<long long, long long>> vii;

#define pb push_back
#define all(x) x.begin(), x.end()

const int V = 1e6 + 7;
const int N = 1e5 + 7;
const int S = 2e3 + 7;
const int inf = 1e9;

long long s, n, v[N], w[N], k[N];

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);

  #ifndef ONLINE_JUDGE
  // freopen("test.inp", "r", stdin);
  //freopen("test.out", "w", stdout);
  #endif

  cin >> s >> n;
  for (int i = 1; i <= n; i++) cin >> v[i] >> w[i] >> k[i];

    vii obj[S];
    long long dp[2001];
    memset(dp, 0, sizeof dp);
    for (int i = 1; i <= n; i++) {
      obj[w[i]].pb({v[i], k[i]});
    }

    for (int i = 0; i <= s; i++) {
      if (obj[i].size() == 0) continue;
      sort(all(obj[i]), greater<pair<int, int>>());

      int id = 0;
      for (int j = 0; j * i < s; j++) {
        if (id >= obj[i].size()) break;
        for (int k = s; k >= i; k--) {
          dp[k] = max(dp[k], dp[k - i] + obj[i][id].first);
        }
        --obj[i][id].second;
        if (obj[i][id].second == 0) ++id;
      }
    }
    cout << dp[s] << endl;

}

컴파일 시 표준 에러 (stderr) 메시지

knapsack.cpp: In function 'int main()':
knapsack.cpp:42:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         if (id >= obj[i].size()) break;
      |             ~~~^~~~~~~~~~~~~~~~

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