Submission #634506

#	Time	Username	Problem	Language	Result	Execution time	Memory
634506		TS_2392	Knapsack (NOI18_knapsack)	C++14	100 / 100	378 ms	19544 KiB

knapsack

#include <bits/stdc++.h>
#define FAST ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define all(x) (x).begin(),(x).end()
#define sqr(x) (x)*(x)
#define mp make_pair
#define fi first
#define se second
using namespace std;
typedef long long ll;
typedef long double ldb;
typedef pair<ll,ll> pll;
typedef pair<ll,int> pli;
typedef pair<int,ll> pil;
typedef pair<int,int> pii;
typedef pair<double,double> pdd;
typedef unsigned long long  ull;
int s,n,dp[2001][2001],res;
vector<pii> w[2001];
int main(){
    FAST;
    cin>>s>>n;
    for(int i=1;i<=n;++i){
        int V,W,K;
        cin>>V>>W>>K;
        w[W].push_back(mp(V,K));
    }
    for(int i=1;i<=s;++i){
        //cout<<i<<'\n';
        sort(w[i].begin(),w[i].end(),greater<pii>());
        for(int j=1;j<=s;++j){
            int idx=0,cnt=0,Sw=0,Sval=0;
            vector<pii> a(w[i]);
            dp[i][j]=dp[i-1][j];
            while(cnt<j/i&&idx<w[i].size()){
                ++cnt;
                Sw+=i;
                Sval+=a[idx].fi;
                dp[i][j]=max(dp[i][j],dp[i-1][j-Sw]+Sval);
                a[idx].se--;
                if(!a[idx].se) ++idx;
            }
            //cout<<j<<' '<<dp[i][j]<<'\n';
            res=max(res,dp[i][j]);
        }
    }
    cout<<res;
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:34:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |             while(cnt<j/i&&idx<w[i].size()){
      |                            ~~~^~~~~~~~~~~~

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