Submission #1322664

#	Time	Username	Problem	Language	Result	Execution time	Memory
1322664		trandinhnhat	Knapsack (NOI18_knapsack)	C++20	73 / 100	376 ms	327680 KiB

knapsack

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ull unsigned long long
#define str string
#define ch char
#define task ""
#define pb push_back
#define ii pair<ll,ll>
#define iii pair <ll, ii>
#define fi first
#define se second
using namespace std;

template<class X, class Y>
bool maximize(X &x, const Y &y) { return (x < y) ? (x = y, true) : false; }

template<class X, class Y>
bool minimize(X &x, const Y &y) { return (x > y) ? (x = y, true) : false; }

const ll mod = 1e9 + 7;
const ll N = 1e6;
const ll inf = LLONG_MAX;
const ll SHIFT = 1e6;

ll a[N], w[N], v[N], dp[N];
ll n, s;

void sub1();
void sub2();
void sub3();

vector <ll> item[N];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    if (fopen(task ".inp", "r")) {
        freopen(task ".inp", "r", stdin);
        freopen(task ".out", "w", stdout);
    }
    cin >> s >> n;
    /*for (ll i = 1; i <= n; i++) {
        cin >> v[i] >> w[i] >> a[i];
    }
    for (ll i = 1; i <= n; i++) {
        for (ll j = s; j >= w[i]; j--) {
            for (ll k = 1; k <= a[i]; k++) {
                if (j - k * w[i] >= 0) {
                    dp[j] = max(dp[j], dp[j - k * w[i]] + k * v[i]);
                } else {
                    break;
                }
            }
        }
    }*/

    for (ll i = 1; i <= n; i++) {
        ll v, w, k;
        cin >> v >> w >> k;
        ll take = min(k, (ll) s / w);
        for (ll t = 0; t < take; t++) {
            item[w].push_back(v);
        }
    }

    for (ll w = 0; w <= s; w++) {
        if (item[w].empty()) continue;
        sort (item[w].begin(), item[w].end(), greater<ll>());
        if (item[w].size() > s / w) {
            item[w].resize(s / w);
        }
        for (ll v : item[w]) {
            for (ll j = s; j >= w; j--) {
                dp[j] = max(dp[j], dp[j - w] + v);
            }
        }
    }
    cout << dp[s];
    return 0;
}
/*Set the pace, set the goal, maintain your streak by solving problem everyday*/
/*
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀   ⣠⡀⠀⠀⠀⠀⠀⣀⣴⠞⠀⠀⠀⠀⠀⠀ ⢀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀   ⡼⣿⠀⠀⠀⣀⠴⠋⢡⠎⠀⠀⣀⡠⠴⠒⢉⠟⠁⠀⠀⠀ ⣀⣠⣤⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢠⡄⠀⠀⠀⢠⠎⠀⡇⢀⡠⠚⠁⠀⢀⡯⠤⠚⠋⠁⠀⢀⡴⢃⣀⠤⠖⠛⠉⣠⠟⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⡜⢧⠀⠀⣰⠋⠀⢠⡧⠋⠀⠀⠀⠀⠈⠀⠀⠀⠀⠀⠰⠞⠋⠉⠀⠀⠀⢀⡜⠁⣀⣀⣀⣀⣀⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⣰⠁⢸⡀⡰⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠋⠉⠉⠉⠉⠉⠉⢉⡭⠛⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⢀⡏⠀⠀⠿⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣠⠖⠉⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⢸⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠶⣋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⣀⠀⠀⠀⡎⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⢦⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠙⣟⠒⠤⡧⠀⠀⠀⠀⠀⠀⠀⠐⢦⠀⠀⠀⠀⣄⠀⠀⠀⠀⢶⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠳⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠈⢦⠀⠀⠀⠀⠀⢀⣤⣴⣶⠿⢿⣷⣦⡀⠀⠘⣷⡄⠀⠀⠀⢳⣄⠀⠀⠀⠀⠰⡄⠀⠀⠀⠀⠀⠐⢶⠲⠤⣤⣌⡑⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠈⢳⡀⣠⣴⡾⠟⠉⠁⠀⠀⠈⢸⣿⣿⣦⡀⠈⢿⣶⣄⠀⠈⢻⣿⣶⣄⠀⠀⢹⣄⠀⠀⠀⠀⠀⠈⠳⡀⠀⠀⠈⠉⠃⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⡿⢟⢁⡀⠀⢀⣀⡤⠶⠒⠛⣿⣿⣿⣿⣦⣌⢿⣿⣿⣦⡀⢿⣿⣿⣿⣦⣄⣿⣷⣄⠀⠀⢷⠤⣀⠹⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⣼⡁⢰⣸⣷⠞⠋⠀⠀⠀⠀⠤⢿⣿⣿⣿⣿⣿⣷⣿⣿⣿⣿⣷⣿⣿⣿⠿⣿⣿⣿⣿⣷⣄⠸⡆⠈⠙⠾⣆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⢿⣽⡿⡏⠛⠀⠀⠀⣀⣤⣶⣶⣾⣿⡿⠿⠛⠛⠉⣏⠉⠁⠀⢰⠟⣯⣾⡟⠻⣿⡍⠉⠛⣟⠳⣽⡀⠀⠀⠈⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⢸⠟⠃⠀⢀⣤⣶⣿⣿⣿⡿⣋⡭⣄⠀⠀⠀⠀⠀⠘⣆⠀⠀⡏⠀⣿⣿⣧⡀⢿⡷⠀⠀⠘⣄⠈⠛⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠈⡇⣀⣶⣾⣿⠿⣫⢿⢟⣵⣾⣟⣻⠀⠀⠀⠀⠀⠀⠹⣶⡀⡇⠀⠈⣿⣇⠇⣾⡷⠀⠀⠀⠘⣆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠻⣿⣿⡋⠀⠸⠁⠎⣿⣿⣟⡿⠇⠀⠀⠀⠀⠀⠀⠀⠯⢳⡇⠀⠀⠛⠋⣸⣿⠆⠀⠀⠀⢤⣜⣦⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠈⢻⣳⡆⢠⣶⡆⠛⠛⠉⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠓⠀⠀⣀⣀⣽⡋⠀⠀⠀⠀⠘⣏⠛⢧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠘⢿⡇⢰⣿⡗⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢿⣿⡟⡏⢷⠀⠀⠀⠀⣤⡘⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⣸⠁⠰⣿⠿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣇⠃⠈⡆⠀⠀⠀⢹⡙⢿⡀⠀⠀⣀⣀⣠⣤⣤⡄⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⢰⠃⠀⠀⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⡏⠀⠀⢹⣄⣀⣀⣼⣷⣶⣾⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠈⠳⢴⣯⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣿⣿⣀⣤⣴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⡀⢀⣀⡤⠤⠄⠀⠀⠀⠀⠀⠀⠀⠀⣀⣀⣤⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⣏⡠⢤⣴⠄⠀⠀⠀⢀⣠⣤⣶⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢹⣄⠀⠛⢀⣠⣶⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣸⣴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⣀⣤⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⣠⣴⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠘⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣟⣿⣽⣿⣾⣿⣿⣿⣿⣿⣿⣿⣿⣶⣄⠀⠀⠀
⠀⠀⠀⠀⠀⠹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⡄⠀
⠀⠀⠀⠀⠀⠀⢹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀
⠀⠀⠀⠀⠀⠀⠀⢻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷
*/

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
knapsack.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen(task ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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