Submission #1079032

#	Time	Username	Problem	Language	Result	Execution time	Memory
1079032		vjudge1	Knapsack (NOI18_knapsack)	C++17	0 / 100	116 ms	129136 KiB

knapsack

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

#define fastIO ios_base::sync_with_stdio(0);cin.tie(nullptr);cout.tie(nullptr)
#define all(x) x.begin(),x.end()
#define take(x) for(int &el : x){ cin >> el;}

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef long long ll;

const int MAX_N = 105;
const int MAX_K = 15;
const int MAX_S = 2005;
int n, S, k, tot_size;
ll v, w;
ll memo[MAX_N * MAX_K][MAX_S];
vector<ll> V, W;

ll dp(int id, ll remW) {
    if(remW == 0 || id == tot_size || W[id] > remW){return 0;}
    if(memo[id][remW] != -1){return memo[id][remW];}

    return memo[id][remW] = max(V[id] + dp(id + 1, remW - W[id]), dp(id + 1, remW));
}

void solve(){

    scanf("%d %d", &S, &n);
    memset(memo, -1, sizeof memo);
    V.clear();
    W.clear();
    for(int i = 0; i < n; i++) {
        scanf("%lld %lld %d", &v, &w, &k);
        for(int j = 0; j < k; j++) {
            V.push_back(v);
            W.push_back(w);
        }
    }

    tot_size = (int)V.size();

    ll ans = dp(0, S);

    printf("%lld\n", ans);
}

int main(){
    fastIO;
    int tc = 1;
    // scanf("%d", &tc);
    while (tc--) {
        solve();
    }
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'void solve()':
knapsack.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     scanf("%d %d", &S, &n);
      |     ~~~~~^~~~~~~~~~~~~~~~~
knapsack.cpp:34:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |         scanf("%lld %lld %d", &v, &w, &k);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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