Submission #963169

#	Time	Username	Problem	Language	Result	Execution time	Memory
963169		Quanmapne	Knapsack (NOI18_knapsack)	C++14	100 / 100	54 ms	7332 KiB

knapsack

#include<bits/stdc++.h>
#define ll long long
#define file "knapsack"
using namespace std;
const int maxN = 1e5 + 5;
int t, n, s;
int v[maxN], w[maxN], k[maxN];
ll dp[2005];
vector< pair<int, int> > obj[maxN];

void solve(){
    for (int i = 1; i <= s; ++i){
        if (obj[i].size() == 0)
            continue;

        sort(obj[i].begin(), obj[i].end(), greater<pair<int, int>>());
        int id = 0;

        for (int j = 0; j * i < s; ++j){

            if (id >= obj[i].size())
                break;

            for (int f = s; f >= i; --f){
                    dp[f] = max(dp[f], dp[f - i] + obj[i][id].first);
            }
            --obj[i][id].second;
            if (obj[i][id].second == 0)
                ++id;
        }
    }
    cout << dp[s];
}

signed main(){
//    freopen(file".inp", "r", stdin);
//    freopen(file".out", "w", stdout);
    ios_base::sync_with_stdio(false); cin.tie(0);
    t = 1;
    while (t){
        cin >> s >> n;
        for (int i = 1; i <= n; ++i){
            cin >> v[i] >> w[i] >> k[i];
            obj[w[i]].push_back({v[i], k[i]});
        }

        solve();

        --t;
    }

    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'void solve()':
knapsack.cpp:21:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |             if (id >= obj[i].size())
      |                 ~~~^~~~~~~~~~~~~~~~

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