Submission #881777

#	Time	Username	Problem	Language	Result	Execution time	Memory
881777		Microfs	Knapsack (NOI18_knapsack)	C++14	73 / 100	148 ms	262144 KiB

knapsack

#include <iostream>
#include <vector>
#include <cstring>
#include <algorithm>
#include <climits>
using namespace std;
const int MAXN = 2003;
long long dp[MAXN];
vector<vector<long long>> items(MAXN);
int main(){
    for(int i =0; i < MAXN; i++)dp[i]=0;
    int s,n; cin >> s >> n;
    for(int i = 0; i < n; i++){
        int v,w,k; cin >> v >> w >> k;
        int smol = min(s/w, k);
        for(int j = 0; j < smol; j++)items[w].push_back(v);

    }
    long long maxmax = -1;
    for(int i =0; i <= s; i++)sort(items[i].begin(),items[i].end(),greater<int>());
    for(int i = 1; i <= s; i++){ // item ind
        int smol = items[i].size();
        smol = min(smol,s/i);
        for(int j = 0; j < smol; j++){ //num of items taken
            for(int k = s; k >= i; k--){
                dp[k] = max(dp[k], dp[k-i]+items[i][j]);
            }
        }
    }
    for(int i = 0; i <= s; i++)maxmax = max(maxmax,dp[i]);
    cout << maxmax << endl;
}

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