Submission #478943

#	Time	Username	Problem	Language	Result	Execution time	Memory
478943		zwicky	Knapsack (NOI18_knapsack)	C++14	12 / 100	2 ms	1900 KiB

knapsack

#include<bits/stdc++.h>
#define ll long long int
#define pb push_back
#define loop(i,a,b) for(ll i=a;i<b;i++) 
#define cy cout<<"YES\n"
#define cn cout<<"NO\n"
#define cm cout<<-1<<"\n";
#define vl vector<ll>
#define vchar vector<char>
#define vvll vector<vector<ll>>
#define vvcr vector<vchar>

using namespace std;

const ll MOD=1e9+7;
ll times=0;
	
ll binepow(ll a,ll b,ll mod){
	if(b==0){
		return 1ll;
	}
	ll k=binepow(a,b/2,mod);
	if(b%2==0){
		times+=(k*k)/mod;
		return (k*k)%mod;
	}
	else{
		ll zz=(k*a)/mod;
		ll newo=(k*a)%mod;
		ll vv=(newo*k)/MOD;
		times+=(vv+(zz*k)/mod+(zz*k)%MOD);
		return (((k*a)%mod)*k)%mod;
	}
}

////////////////////////////////////////////////////////
void solve(){
	ll s,n;
	cin>>s>>n;
	vl w(n,0);
	vl value(n,0);
	vl items(n,0);
	loop(i,0,n){
		cin>>value[i]>>w[i]>>items[i];
	}
	vvll ans(n+1,vl(s+1,0));
	ll final=0;
	vl count(s+1,0);
	loop(i,1,n+1){
		fill(count.begin(),count.end(),0);
		loop(j,1,s+1){
			ans[i][j]=ans[i-1][j];
			if(j-w[i-1]>=0){
				if(count[j-w[i-1]]<items[i-1]){
					if(ans[i][j]<(ans[i][j-w[i-1]]+value[i-1])){
						count[j]=count[j-w[i-1]]+1;
						ans[i][j]=ans[i][j-w[i-1]]+value[i-1];
					}
				}
				else{
					if(ans[i][j]<(ans[i][j-w[i-1]])){
						count[j]=count[j-w[i-1]];
						ans[i][j]=ans[i][j-w[i-1]];
					}
				}
			}
			final=max(final,ans[i][j]);
		}
	}
	cout<<final<<endl;
	return;
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    // freopen(".in","r",stdin);
    // freopen(".out","w",stdout);
    
    solve();
}

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