Submission #683264

#	Time	Username	Problem	Language	Result	Execution time	Memory
683264		vjudge1	Knapsack (NOI18_knapsack)	C++17	0 / 100	1 ms	212 KiB

knapsack

#include <bits/stdc++.h>
#define int long long
#define pii pair<int, int>
#define pb push_back
#define gcd __gcd
#define task "1e5 + 5"
using namespace std;
const int N = 1e5 + 5;
int s, n, dp[2005];
vector<int> V, W;
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen(task".inp", "r", stdin);
    //freopen(task".out", "w", stdout);
    cin >> s >> n;
    for(int i = 1; i <= n; i++){
        int v, w, k; cin >> v >> w >> k;
        int pow2 = 1;
        while(k >= pow2 && pow2 * w <= s){
            V.pb(pow2 * v);
            W.pb(pow2 * w);
            k -= pow2, pow2 *= 2;
        }
        if(k > 0 && k * w <= s){
            V.pb(k * v);
            W.pb(k * w);
        }
    }
    int ans = 0, sum = 0;
    for(int i = 0; i < W.size(); i++){
        for(int j = min(s, sum); j >= 0; j--){
            dp[j + W[i]] = max(dp[j + W[i]], dp[j] + V[i]);
            ans = max(ans, dp[j]);
            sum += W[i];
        }
    }
    cout << ans << '\n';
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:31:22: 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]
   31 |     for(int i = 0; i < W.size(); i++){
      |                    ~~^~~~~~~~~~

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