Submission #1015814

#	Time	Username	Problem	Language	Result	Execution time	Memory
1015814		asli_bg	Knapsack (NOI18_knapsack)	C++11	12 / 100	51 ms	110416 KiB

knapsack

#include<bits/stdc++.h>
using namespace std;
 
#define all(x) x.begin(),x.end()
#define fi first
#define se second
 
#define pb push_back 
#define sp <<' '<<
 
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vll;
typedef vector<bool> vb;
 
#define FOR(i,a) for(int i=0;i<(a);i++)
#define FORE(i,a,b) for(int i=(a);i<(b);i++)
#define RFOR(i,a) for(int i=(a);i>=0;i--)
#define contp(a) for(auto el:a) {cout<<el.fi<<'-'<<el.se<<' ';}cout<<endl
#define cont(a) for(auto el:a) {cout<<el<<' ';}cout<<endl

const int MAXN=1e5+2;
const int MAXS=2e3+2;

int dp[MAXS];
vii say[MAXS][MAXS]; //say[i][j][x]=y;
            //i. weightte j.weigthe x.valuda olan elemandan y tane var
int ok[MAXS][MAXS];

bool mycmp(pii a,pii b) {
    return a.fi>b.fi;
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n,mxw;
    cin>>mxw>>n;
    vi v(n+1);
    vi w(n+1);
    vi k(n+1);
    FOR(i,n){
        cin>>v[i+1]>>w[i+1]>>k[i+1];
    }

    FOR(i,n){
        say[0][w[i+1]].pb({v[i+1],k[i+1]});
        ok[0][w[i+1]]=0;
    }

    FOR(i,n){
        sort(all(say[0][w[i+1]]),mycmp);
    }

    dp[0]=0;
    int ind;
    FORE(i,1,mxw+1){
        ind=0;
        dp[i]=dp[i-1];
        FORE(j,1,n+1){

            if(i-w[j]>=0 and ok[i-w[j]][w[j]]!=-1 and !say[i-w[j]][w[j]].empty()){ //kullan
                //cout<<"sz "<<say[i-w[j]][w[j]].size()<<endl;
                int val=say[i-w[j]][w[j]][ok[i-w[j]][w[j]]].fi;
                if(dp[i-w[j]]+val>dp[i]){
                    dp[i]=dp[i-w[j]]+val;
                    ind=j;
                }
            }

        }

        if(ind>0){
            FORE(j,1,i+1){
                for(auto el:say[i-w[ind]][j]) say[i][j].pb(el);
                ok[i][j]=ok[i-w[ind]][j];
            }

            int temp=--say[i][w[ind]][ok[i][w[ind]]].se;
            if(!temp) {
                ok[i][w[ind]]++;
                if(ok[i][w[ind]]>=say[i][w[ind]].size()) ok[i][w[ind]]=-1;
            }
        }
        else{ //kullanmadım
            FORE(j,1,i+1){
                for(auto el:say[i-1][j]) say[i][j].pb(el);
                ok[i][j]=ok[i-1][j];
            }
        }
    }

    //FOR(i,mxw+1) cout<<dp[i]<<' ';
    //cout<<endl;

    cout<<dp[mxw]<<endl;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:85:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |                 if(ok[i][w[ind]]>=say[i][w[ind]].size()) ok[i][w[ind]]=-1;
      |                    ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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