Submission #1289551

#	Time	Username	Problem	Language	Result	Execution time	Memory
1289551		muhammad-mutahir	Knapsack (NOI18_knapsack)	C++20	100 / 100	40 ms	3208 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;

#define print(l) for(auto i:l) cout<<i<<" ";cout<<endl;
#define input(t,l,n) vector<t>l(n);for(int i = 0;i<n;i++)cin>>l[i];
#define int long long
#define pb push_back
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update> 
#define all(l) l.begin(),l.end()
#define pii pair<int,int>
#define fi first
#define se second

const int M = 1e9+7;
const int inf = 1e18;


int bp(int x, int y, int p){
    int res = 1;
    x = x % p;
    while (y > 0) {
 
        if (y & 1)
            res = (res * x) % p;
        y = y >> 1;
        x = (x * x) % p;
    }
    return res;
}
 
int MI(int n, int p){
    return bp(n, p - 2, p);
}
int mul(int x,int y, int p){
    return x * 1ull * y % p;
}
int di(int x,int y, int p){
    return mul(x, MI(y, p), p);
}


int n , m , k , q;



// map<pair<int,int>,int>ob;

void solve(int testcase_number){
    cin>>k>>n;
    vector<vector<pii>>ob(k+1);
    for(int i = 0;i<n;i++){
    	int V,W,K;
    	cin>>V>>W>>K;
    	ob[W].pb({V,K}); 	 
    }
    vector<int>wt,val;
    for(int i = 1;i<=k;i++){
    	
    	sort(all(ob[i]));
    	reverse(all(ob[i]));
    	// print(ob[i]);
    	
    	int tk = 0;
    	for(auto j:ob[i]){
    		// cout<<j.fi<<" "<<j.se<<" ..";
    		if(tk*i>k)break;

    		for(int ij =0 ;ij<j.se;ij++){
    			if(tk*i >k){
    				break;
    			}
    			tk++;
    			wt.pb(i);
    			val.pb(j.fi);
    			
    		}
    	}
    	// cout<<endl;
    }
    // print(wt);
    // print(val);


    vector<int> dp(k + 1, 0);
	for(int i = 0;i<wt.size();i++){
		for (int j = k; j >= wt[i]; j--) {
        	dp[j] = max(dp[j], dp[j - wt[i]] + val[i]);
    	}
		
	}

    cout<< dp[k] <<endl;
    




}


signed main(){
    ios::sync_with_stdio(0);//DO NOT USE IN INTERACTIVE
    cin.tie(0), cout.tie(0);
    cout << fixed<<setprecision(9);

    int t = 1;
    // cin>>t;
    for(int i = 1;i<=t;i++){
        solve(i);
    }

}

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