Submission #745001

#	Time	Username	Problem	Language	Result	Execution time	Memory
745001		glupan	Knapsack (NOI18_knapsack)	C++14	17 / 100	2 ms	1876 KiB

knapsack

#include <bits/stdc++.h>
#define div /
#define ll long long
#define fore(i, l, r) for(int i=int(l); i<int(r); i++)
#define sz(a) int((a).size())

using namespace std;

const int INF = 1e9;
const int MX = 5e5 + 23;
const int MOD = 1000000007;
const int MAX_N = 5e5+23;
const int N = 1e6;

void solve() {
    ll s,n;
    cin >> s >> n;
    vector<ll>p;
    vector<ll>we;
    vector<ll>kk;
    p.push_back(0);
    we.push_back(0);
    kk.push_back(0);
    fore(i,0,n) {
        ll v,w,k;
        cin >> v >> w >> k;
        k=min(k, s div w);
        p.push_back(v);
        we.push_back(w);
        kk.push_back(k);
    }
    ll dp[n+5][s+5];
    memset(dp,0,sizeof dp);
    fore(i,1,p.size()) {
        fore(j,1,s+1) {
            dp[i][j]+=dp[i-1][j];
            fore(k,1,kk[i]+1) {
                we[i]*=k;
                p[i]*=k;
                if(j >= we[i] && dp[i-1][j-we[i]] + p[i] > dp[i][j])
                    dp[i][j] = dp[i-1][j-we[i]] + p[i];
                else
                    break;
            }
        }
    }
    cout << dp[p.size()-1][s] << endl;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    //freopen("feast.in","r",stdin);
    //freopen("feast.out","w",stdout);

    int t=1;
    while(t--)
        solve();
}

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