Submission #488600

#	Time	Username	Problem	Language	Result	Execution time	Memory
488600		A_D	Knapsack (NOI18_knapsack)	C++14	100 / 100	125 ms	145556 KiB

knapsack

#include <bits/stdc++.h>

#define ii pair<int,int>
#define F first
#define S second

using namespace std;
const int N=2e3+100;
const int NN=2e5+100;
const int M=2e4+100;
vector<int> vec;
vector<int> w;
int szz[N];
int sz;
pair<ii,int> a[NN];
int dp[M][N];
void solve()
{
    vec.push_back(0);
    w.push_back(0);
    int s,n;
    cin>>s>>n;
    for(int i=1;i<=n;i++){
        scanf("%d",&a[i].F.F);
        scanf("%d",&a[i].F.S);
        scanf("%d",&a[i].S);
    }
    sort(a+1,a+n+1);
    reverse(a+1,a+n+1);
    for(int i=1;i<=n;i++){
        while(a[i].S&&s>a[i].F.S*szz[a[i].F.S]){
            a[i].S--;
            szz[a[i].F.S]++;
            vec.push_back(a[i].F.F);
            w.push_back(a[i].F.S);
            sz++;
            if(sz>=M){
                return;
            }
        }
    }
    for(int i=1;i<=sz;i++){
        for(int j=1;j<w[i];j++){
            dp[i][j]=dp[i-1][j];
        }
        for(int j=w[i];j<=s;j++){
            dp[i][j]=max(dp[i-1][j],dp[i-1][j-w[i]]+vec[i]);
        }
    }
    cout<<dp[sz][s]<<endl;
}
main()
{
    //freopen("face.in","r",stdin);
    //freopen("face.out","w",stdout);
    int t=1;
//    cin>>t;
    while(t--){
        solve();
    }
}

Compilation message (stderr)

knapsack.cpp:52:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   52 | main()
      | ^~~~
knapsack.cpp: In function 'void solve()':
knapsack.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         scanf("%d",&a[i].F.F);
      |         ~~~~~^~~~~~~~~~~~~~~~
knapsack.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         scanf("%d",&a[i].F.S);
      |         ~~~~~^~~~~~~~~~~~~~~~
knapsack.cpp:26:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         scanf("%d",&a[i].S);
      |         ~~~~~^~~~~~~~~~~~~~

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