Submission #1083854

#	Time	Username	Problem	Language	Result	Execution time	Memory
1083854		tkvinhtruongquang	Knapsack (NOI18_knapsack)	C++14	37 / 100	1 ms	440 KiB

knapsack

#include<bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pb push_back
#define pf push_front
#define sz(x) int(x.size())
#define all(x) x.begin(), x.end()
#define clz __builtin_clz
#define popcount __builtin_popcount
#define lb(x) lower_bound(x)
#define ub(x) upper_bound(x)
#define loop(i, j, n, k) for(int i = j; i <= n; i += k)
#define fast ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0)

template <typename T>
inline void print(T x) { cerr << x << endl; }
template <typename T>
inline void print(vector <T> x) { cerr << '['; loop(i, 0, sz(x) - 2, 1) cerr << x[i] << ", "; cerr << x.back() << ']' << endl; }
template <typename T>
inline bool maximize(T &a, const T &b) { return a < b ? (a = b) : 0; }
template <typename T>
inline bool minimize(T &a, const T &b) { return a > b ? (a = b) : 0; }

using ll = long long;
using vi = vector<int>;
using pii = pair<int, int>;
using pss = pair<string, string>;
using vll = vector<ll>;
using pll = pair<ll, ll>;

#define debug(x) cerr << #x << " = "; print(x)

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
    freopen("error.txt", "w", stderr);
}

using namespace std;

int main() {
    int S, N;
    cin >> S >> N;
    vector<ll> dp(S + 1, 0);

    for (int i = 0; i < N; i++) {
        int V, W, K;
        cin >> V >> W >> K;
        for (int j = 1; K > 0; j *= 2) {
            int x = min(j, K);
            K -= x;
            for (int s = S; s >= x * W; s--) {
                dp[s] = max(dp[s], dp[s - x * W] + x * V);
            }
        }
    }

    cout << dp[S] << endl;
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'void setIO(std::string)':
knapsack.cpp:36:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:38:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     freopen("error.txt", "w", stderr);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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