Submission #1319375

#	Time	Username	Problem	Language	Result	Execution time	Memory
1319375		ledinhmanh0401	Knapsack (NOI18_knapsack)	C++20	73 / 100	1089 ms	444 KiB

knapsack

#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define endl '\n'
using namespace std;

const ll MOD = 1e9+7;

void setup(){
    if(fopen("input.INP", "r")){
        freopen("input.INP", "r", stdin);
        freopen("output.OUT", "w", stdout);
    }
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
}

int main(){
    setup();
    int s,n;
    cin>>s>>n;
    vector<ll> dp(s+1,0);
    for(int i=1;i<=n;i++){
        ll v,w,k;
        cin>>v>>w>>k;
        k=min(k,(ll)s/w);
        for(ll t=1;k>0;t*=2){
            ll take=min(t,k);
            ll wt=take*w;
            ll val=take*v;
            for(int j=s;j>=wt;j--)
                dp[j]=max(dp[j],dp[j-wt]+val);
            k-=take;
        }
    }
    cout<<*max_element(dp.begin(),dp.end());
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'void setup()':
knapsack.cpp:11:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         freopen("input.INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:12:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         freopen("output.OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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