Submission #676837

#	Time	Username	Problem	Language	Result	Execution time	Memory
676837		MarwenElarbi	Knapsack (NOI18_knapsack)	C++14	73 / 100	928 ms	3796 KiB

knapsack

#include <bits/stdc++.h>
#define vi vector<int>
#define ve vector
#define ll long long
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e9
#define eps 1e-7
#define eps1 1e-2
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
using namespace std;
const int MOD = 1e9+7;
const int nax = 1e2+5;
double PI=3.14159265359;
int arx[8]={1,1,0,-1,-1,-1, 0, 1};
int ary[8]={0,1,1, 1, 0,-1,-1,-1};
typedef complex<int> Point;
#define X real()
#define Y imag()
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
ll n,k;
ll value[nax],weight[nax],number[nax];
ll dp[nax][2005];
ll search(int x,int z){
    if (z>k) return -1e18;
    if (x==n) return 0;
    if (dp[x][z]!=-1) return dp[x][z];
    dp[x][z]=0;
    ll a=2000;
    a=min(number[x],a);
    for (int i = 0; i <= a; ++i)
    {
        dp[x][z]=max(dp[x][z],value[x]*(i)+search(x+1,z+weight[x]*(i)));
    }
    //cout << dp[x][z]<<endl;
    return dp[x][z];
}
int main(){
    optimise;
    /*#ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif*/
    //setIO("feast");
    cin>>k>>n;
    //cout << n<<endl;
    memset(dp,-1,sizeof dp);
    for (int i = 0; i < n; ++i)
    {
        cin>>value[i]>>weight[i]>>number[i];
    }
    cout << search(0,0)<<endl;
}   

Compilation message (stderr)

knapsack.cpp: In function 'void setIO(std::string)':
knapsack.cpp:30:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:31:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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