Submission #705990

#	Time	Username	Problem	Language	Result	Execution time	Memory
705990		lukameladze	Knapsack (NOI18_knapsack)	C++14	73 / 100	1090 ms	18424 KiB

knapsack

# include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define int long long
#define pii pair <int, int>
#define pb push_back
const int N = 1e6 + 5;
int t,n,a[N],v[N],w[N],k[N],s,dp[N];
main() {
    std::ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    cin>>s>>n;
    vector <pii> vec;
    vec.pb({0, 0});
    for (int i = 1; i <= n; i++) {
        cin>>v[i]>>w[i]>>k[i];
        
        for (int j = 0; j <= 30; j++) {
            if (k[i] >= (1<<j)) {
                int x = (1<<j);
                k[i] -= x;
                if (x * w[i] <= s)
                vec.pb({x * v[i], x * w[i]});
            }
        }
        if (k[i] && w[i] * k[i] <= s) vec.pb({k[i] * v[i], k[i] * w[i]});
    }
    int ans = 0;
    for (int i = 1; i < vec.size(); i++) {
        for (int j = s; j >= vec[i].s; j--) {
            dp[j] = max(dp[j], dp[j - vec[i].s] + vec[i].f);
            ans = max(ans, dp[j]);
        }
    }
    cout<<ans<<"\n";
}

Compilation message (stderr)

knapsack.cpp:10:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   10 | main() {
      | ^~~~
knapsack.cpp: In function 'int main()':
knapsack.cpp:29:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for (int i = 1; i < vec.size(); i++) {
      |                     ~~^~~~~~~~~~~~

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