Submission #487548

#	Time	Username	Problem	Language	Result	Execution time	Memory
487548		Biaz	Knapsack (NOI18_knapsack)	C++17	73 / 100	1088 ms	2660 KiB

knapsack

#include <bits/stdc++.h>
#define int long long
#define Nanase_Kurumi_aka_menhera_chan_is_mine ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define pb push_back
#define pi pair<int, int>
#define ALL(i) i.begin(),i.end()
#define gcd(i,j) __gcd(i,j)
#define fi first
#define se second
#define INF 10000000000
#define eps 0.00000001
#define ist insert
//#define mod 1000000007
#define N 100005
#define M 1000005
#define DNE nullptr
//#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math")
//#pragma GCC optimize("O2")
using namespace std;
typedef long long ll;
int min(int a, int b){return a < b ? a : b;}
int max(int a, int b){return a > b ? a : b;}
bool isprime(int k){bool is=1 ; for ( int i = 2 ; i*i <= k ; i++ ) if ( k % i == 0 ) is = 0 ; return k>1?is:0;}
const double PI=acos(-1);
/*int read(){
   int s=0,w=1;
   char c=getchar();
   while (c<'0'||c>'9'){if (c=='-')w=-1;c=getchar();}
   while (c>='0'&&c<='9') s=s*10+c-'0',c=getchar();
   return s*w;
}*/

int n,S;
vector<int> dp,w,v;
int t[N];
void sol(){
    cin >>S>>n;
    dp.resize(S+1,0);
    w.resize(n);
    v.resize(n);
    for (int i=0;i<n;i++)
        cin >>v[i]>>w[i]>>t[i];
    for (int i=0,r;i<n;i++){
        for (int r=0;(1LL<<r)<=t[i];r++){
            int nw=w[i]*(1LL<<r);
            int nv=v[i]*(1LL<<r);
            for (int k=S;k>=nw;k--)
                dp[k]=max(dp[k],dp[k-nw]+nv);
            t[i]-=(1LL<<r);
        }
        if (t[i]!=0){
            int nw=w[i]*t[i];
            int nv=v[i]*t[i];
            for (int k=S;k>=nw;k--)
                dp[k]=max(dp[k],dp[k-nw]+nv);
        }
    }

    for (int i=1;i<=S;i++) dp[i]=max(dp[i],dp[i-1]);
    cout <<dp[S]<<"\n";
}

signed main(){
    Nanase_Kurumi_aka_menhera_chan_is_mine
    int _=1;
    //cin >>_;
    while (_--)sol();

    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'void sol()':
knapsack.cpp:43:18: warning: unused variable 'r' [-Wunused-variable]
   43 |     for (int i=0,r;i<n;i++){
      |                  ^

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