Submission #1212520

#	Time	Username	Problem	Language	Result	Execution time	Memory
1212520		cubed	Knapsack (NOI18_knapsack)	C++20	0 / 100	28 ms	48452 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define endl '\n'
 
const int MOD = 1e9+7;
const int inf =1e9;

bool multi=false;

int main()
{
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif

    ll t=1;
    if (multi) cin>>t;
 
    while (t--) {
        int s, n;
        cin>>s>>n;

        vector<pair<ll, ll>> items;
        for (int i=0; i<n; i++) {
            ll v,w,k;
            cin>>v>>w>>k;

            for (ll p=1; k>0; p<<=1) {
                ll cnt = min(p, k);
                items.push_back({v*cnt, w*cnt});
                k-=cnt;
            }
        }

        vector<ll> dp(s+1, 0);
        for (auto item:items) {
            ll val=item.first, weight=item.second;
            for (int i=s; i>=weight; i--) {
                dp[i]=max(dp[i], dp[i-weight]+val);
            }
        }

        cout<<dp[s];
    }
 
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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