Submission #965124

#	Time	Username	Problem	Language	Result	Execution time	Memory
965124		Elliot_7002	Knapsack (NOI18_knapsack)	C++14	37 / 100	1012 ms	600 KiB

knapsack

#include <iostream>
#include <bits/stdc++.h> 
using namespace std;
typedef tuple<int,int,int> triad;
#define int long long
#define INF 1e9
int s,n,val,weight,occ;
vector<int> dp;
bool update(int value, int w){
    bool useful = false;
    for(int i = dp.size()-w-1; i >= 0; i--){
        dp[i + w] = max(dp[i+w], dp[i] + value);
        if(dp[i+w] == dp[i] + value){
          useful = true;
        }
    }
    return useful;
}
int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    cin >> s >> n;
    dp.resize(s+1);
    int mod = 1e9+7;
    dp[0] = 0;
    if(n==1){
      cin >> val >> weight >> occ;
      if(s/weight > occ){
        cout << occ*val;
      }
      else{
        cout << val*(s/weight);
      }
    }
    for(int i = 0; i < n; i++){
        cin >> val >> weight >> occ;
        bool help = true;
        while(occ-- && help){
            help = update(val,weight);
        }
    }
    int ans = dp[s];
    cout << ans;
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int32_t main()':
knapsack.cpp:25:9: warning: unused variable 'mod' [-Wunused-variable]
   25 |     int mod = 1e9+7;
      |         ^~~

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