Submission #1255127

#	Time	Username	Problem	Language	Result	Execution time	Memory
1255127		otarius	Festival (IOI25_festival)	C++20	48 / 100	119 ms	91308 KiB

festival

#include "festival.h"
#include <bits/stdc++.h>
#include <bits/extc++.h>
using namespace __gnu_pbds;
using namespace std;

// #pragma GCC optimize("Ofast")
// #pragma GCC optimize ("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#define ff first
#define sc second
#define pb push_back
#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define ull unsigned long long
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rngl(chrono::steady_clock::now().time_since_epoch().count());

#define int long long
// #define int unsigned long long

// #define ordered_set(T) tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>
// #define ordered_multiset(T) tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>

// const ll mod = 1e9 + 7;
// const ll mod = 998244353;

const ll inf = 1e9;
const ll biginf = 1e18;
// const int maxN;

bool comp(array<int, 3> a, array<int, 3> b) {
    return a[0] * a[1] * b[1] + b[0] * b[1] < b[0] * a[1] * b[1] + a[0] * a[1];
}
vector<int32_t> max_coupons(int32_t a, vector<int32_t> p, vector<int32_t> t) {
    vector<array<int, 3>> v, tv; vector<int> pos, pref;
    for (int i = 0; i < p.size(); i++) {
        if (t[i] > 1) v.pb({p[i], t[i], i});
        else pos.pb(i);
    } sort(all(v), comp);
    
    sort(all(pos), [&](int a, int b) {
        return p[a] < p[b];
    });


    pref.resize(pos.size());
    for (int i = 0; i < pos.size(); i++) {
        pref[i] = p[pos[i]];
        if (i > 0) pref[i] += pref[i - 1];
    }

    vector<int32_t> ans;
    for (int i = 0; i < v.size(); i++) {
        if (1LL * (a - v[i][0]) * v[i][1] >= a) {
            a = min(1LL * (a - v[i][0]) * v[i][1], 200000000000000LL); ans.pb(v[i][2]);
        } else tv.pb(v[i]);
    } v = tv;


    int n = v.size();
    ll dp[n + 1][50];
    for (int i = 0; i <= n; i++)
        for (int j = 0; j < 50; j++) dp[i][j] = -1;
    dp[0][0] = a;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < 50; j++)
            dp[i + 1][j] = dp[i][j];
        for (int j = 0; j < 49; j++)
            dp[i + 1][j + 1] = max(dp[i + 1][j + 1], 1LL * (dp[i][j] - v[i][0]) * v[i][1]);
    }



    int mx = -1, cnt, cur;
    for (int i = 0; i < 50; i++) {
        if (dp[n][i] < 0) continue;
        cur = upper_bound(all(pref), dp[n][i]) - pref.begin();
        if (cur + i > mx) { mx = cur + i; cnt = i; }
    }

    vector<int> tmp; int tmp1 = mx - cnt;
    for (int i = n - 1; i >= 0; i--) {
        if (dp[i + 1][cnt] != dp[i][cnt]) tmp.pb(v[i][2]), cnt--;
    }
    reverse(all(tmp)); for (int i : tmp) ans.pb(i);
    for (int i = 0; i < tmp1; i++) ans.pb(pos[i]);
    return ans;
}
// int main() {
//   int N, A;
//   assert(2 == scanf("%d %d", &N, &A));
//   std::vector<int> P(N), T(N);
//   for (int i = 0; i < N; i++)
//     assert(2 == scanf("%d %d", &P[i], &T[i]));
//   fclose(stdin);

//   std::vector<int> R = max_coupons(A, P, T);

//   int S = R.size();
//   printf("%d\n", S);
//   for (int i = 0; i < S; i++)
//     printf("%s%d", (i == 0 ? "" : " "), R[i]);
//   printf("\n");
//   fclose(stdout);

//   return 0;
// }

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 15
• Subtask 5: 27 / 27
• Subtask 6: 16 / 16
• Subtask 7: 0 / 18