제출 #572985

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
572985		MohamedFaresNebili	Uplifting Excursion (BOI22_vault)	C++14	0 / 100	5050 ms	98692 KiB

vault

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

        using namespace std;
        using namespace __gnu_pbds;

        using ll = long long;
        using ii = pair<int, int>;
        using vi = vector<int>;

        #define pb push_back
        #define pp pop_back
        #define ff first
        #define ss second
        #define lb lower_bound

        typedef tree<int, null_type, less<int>, rb_tree_tag,
            tree_order_statistics_node_update> indexed_set;

        const int oo = 1e9 + 7;

        int N, M, A[1000];
        map<int, int> DP[101][2500];
        int solve(int i, int curr, int state) {
            if(i == 2 * N + 1) {
                if(state == M) return curr;
                return -oo;
            }
            if(DP[i][curr].count(state))
                return DP[i][curr][state];
            int best = -oo;
            for(int l = 0; l <= A[i]; l++)
                best = max(best,
                    solve(i + 1, curr + l, state + l * (i - N)));
            return DP[i][curr][state] = best;
        }

        int32_t main() {
            ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
            cin >> N >> M;
            for(int l = 0; l <= 2 * N; l++) cin >> A[l];
            int ans = solve(0, 0, 0);
            if(ans == -oo) cout << "impossible\n";
            else cout << ans << "\n";
        }

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