Submission #618109

#	Time	Username	Problem	Language	Result	Execution time	Memory
618109		Nafeeszx	Knapsack (NOI18_knapsack)	C++17	73 / 100	543 ms	262144 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;
#define trav(a, x) for(auto& a : x)
#define FOR(i, a, b) for (int i=(a); i<=(signed)(b); i++)
#define ROF(i, a, b) for (int i=(a); i>=(signed)(b); i--)
#define F0R(i, a) for (int i=0; i<(signed)(a); i++)
#define vi vector<int>
#define vvl vector<vector<ll>>
#define all(v) (v).begin(),(v).end()
typedef long long ll;

void setIO(string name = "") { 
    ios_base::sync_with_stdio(0); cin.tie(0);
    if(name.size()){
        freopen((name+".in").c_str(), "r", stdin);
        freopen((name+".out").c_str(), "w", stdout);
    }
}

const int mod = 1e9 + 7, MOD = 998244353;

int dp[100000][2001];

int main() 
{	
    setIO();
    int s, n;
    cin >> s >> n;
    vector<int> v(n), w(n), k(n);
    F0R(i, n) cin >> v[i] >> w[i] >> k[i];

    for(int t = 0; t * w[0] <= s && t <= k[0]; ++t) dp[0][t*w[0]] = t * v[0];

    F0R(i, n-1) {
        FOR(j, 0, s) {
            for(int t = 0; j + t * w[i+1] <= s && t <= k[i+1]; ++t) {
                dp[i+1][j+t*w[i+1]] = max(dp[i+1][j+t*w[i+1]], dp[i][j] + t * v[i+1]);
            }
        } 
    } 
    
    int res = 0;
    //for(int j = 0; j < n; ++j) {
        for(int i = 0; i <= s; ++i) {
            res = max(res, dp[n-1][i]);
            //cout << dp[j][i] << " ";
        }
        //cout << "\n";
    //}
    cout << res;
    //cout << dp[0][12];
    
    return 0;
}   

Compilation message (stderr)

knapsack.cpp: In function 'void setIO(std::string)':
knapsack.cpp:15:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         freopen((name+".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen((name+".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