Submission #745277

#	Time	Username	Problem	Language	Result	Execution time	Memory
745277		Azm1t	Knapsack (NOI18_knapsack)	C++17	73 / 100	137 ms	262144 KiB

knapsack

#include "bits/stdc++.h"
using namespace std;
#define forn for (int i = 0; i < n; i++)
#define int long long
#define ed "\n"
#define cyes cout << "YES\n"
#define cno cout << "NO\n"
#define pb push_back
#define deb cout << "Hi\n"
#define pint pair<int, int>
const long long MOD = 1000000007;


void dbg_out(){cerr<<"\n";}
template<typename Head,typename... Tail>
void dbg_out(Head H,Tail... T){cerr<<' '<<H;dbg_out(T...);}
#define debug(...) cerr<<"("<<#__VA_ARGS__<<"):",dbg_out(__VA_ARGS__)

//-------------------------------------------------------------------------------------------------------------------------------------------------------------------//


int32_t main(){

    std::ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int w, n; cin>>w>>n;
    vector<array<int, 3>> v;
    forn{
        int vi, wi, ki; cin>>vi>>wi>>ki;
        v.pb({vi, wi, ki});
    }

    vector<array<int, 2>> v2;
    for(auto val: v){
        auto[vi, wi, ki] = val;
        for(int i = 0; i <= 34; i++){
            int x = (1LL << i);
            if(ki < x) break;
            ki -= x;
            v2.pb({vi*x, wi*x});
        }
        if(ki > 0) v2.pb({vi*ki, wi*ki});
    }

    n = v2.size();
    int dp[n][w+1];
    for(int i = 0; i < n; i++){
        for(int j = 0; j <= w; j++) dp[i][j] = 0;
    }

    for(int i = 0; i < n; i++){
        for(int j = 1; j <= w; j++){
            if(i == 0){
                if(v2[i][1] == j) dp[i][j] = v2[i][0];
            }
            else{
                dp[i][j] = dp[i-1][j];
                if(j - v2[i][1] >= 0) dp[i][j] = max(dp[i][j], dp[i-1][j-v2[i][1]] + v2[i][0]);
            }
        }
    }

    // forn{
    //     for(int j = 0; j <= w; j++) cout << dp[i][j] << " ";
    //     cout << ed;
    // }


    int ans = 0;
    for(int i = 0; i <= w; i++) ans = max(ans, dp[n-1][i]);

    cout << ans << ed;

    





}

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