Submission #701610

#	Time	Username	Problem	Language	Result	Execution time	Memory
701610		ifateen	Knapsack (NOI18_knapsack)	C++14	73 / 100	320 ms	262144 KiB

knapsack

#include <iostream>
#include <vector>
#include <set>
#include <map>
using namespace std;
#define int long long
#define double long double
#define vec vector
#define vi vec<int>
#define pii pair<int,int>
#define vpi vec<pii>
#define MP make_pair
#define PB push_back
#define F first
#define S second
#define pq priority_queue
#define all(v) v.begin(), v.end()


signed main() {
    vi weights, vals;
    int W, n;
    cin >> W >> n;
    for (int i = 0; i < n; i++) {
        int val, weight, num;
        cin >> val >> weight >> num;
        num = min(num, W / weight + 1);
        for (int j = 0; j < num; j++) {
            weights.PB(weight);
            vals.PB(val);
        }
    }

    /*
     * now we solve normal knapsack
     */

    vi dp;
    dp.assign(W + 1, 0);
    for (int i = 1; i <= weights.size(); i++) {
        for (int w = W; w >= 0; w--) {
            if (weights[i - 1] <= w) {
                dp[w] = max(dp[w], dp[w - weights[i - 1]] + vals[i - 1]);
            }
        }
    }

    cout << dp[W] << endl;


    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:40:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for (int i = 1; i <= weights.size(); i++) {
      |                     ~~^~~~~~~~~~~~~~~~~

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