Submission #564007

#	Time	Username	Problem	Language	Result	Execution time	Memory
564007		KoD	Editor (BOI15_edi)	C++17	35 / 100	3082 ms	6360 KiB

edi

#include <bits/stdc++.h>
 
using std::vector;
using std::array;

int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int N;
    std::cin >> N;
    vector<int> op(N);
    for (auto& x : op) {
        std::cin >> x;
    }
    vector<char> active(N);
    vector<int> par(N);
    vector<int> prev(N);
    for (int i = 0; i < N; ++i) {
        active[i] = true;
        if (op[i] < 0) {
            int j = i - 1;
            while (op[j] <= op[i] or !active[j]) {
                j -= 1;
            }
            par[i] = j;
            prev[i] = j - 1;
            int k = i;
            while (op[k] < 0) {
                active[par[k]] ^= 1;
                k = par[k];
            }
            {
                int x = i - 1;
                while (op[x] <= op[i]) {
                    x = prev[x];
                }
                assert(x == j);
            }
        } else {
            par[i] = -1;
            prev[i] = i;
        }
        int ans = 0;
        for (int j = i; j >= 0; --j) {
            if (active[j] and op[j] > 0) {
                ans = op[j];
                break;
            }
        }
        std::cout << ans << '\n';
    }
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 15 / 15
• Subtask 3: 0 / 28
• Subtask 4: 0 / 37