Submission #604250

#	Time	Username	Problem	Language	Result	Execution time	Memory
604250		skittles1412	Comparing Plants (IOI20_plants)	C++17	14 / 100	4099 ms	12184 KiB

plants

#include "bits/extc++.h"

using namespace std;

template <typename T>
void dbgh(const T& t) {
    cerr << t << endl;
}

template <typename T, typename... U>
void dbgh(const T& t, const U&... u) {
    cerr << t << " | ";
    dbgh(u...);
}

#ifdef DEBUG
#define dbg(...)                                              \
    cerr << "L" << __LINE__ << " [" << #__VA_ARGS__ << "]: "; \
    dbgh(__VA_ARGS__);
#else
#define dbg(...)
#define cerr   \
    if (false) \
    cerr
#endif

#define endl "\n"
#define long int64_t
#define sz(x) int((x).size())

struct PS {
    vector<int> psum;

    PS(int n) : psum(n + 1) {}

    void add(int l, int r, int x) {
        psum[l] += x;
        psum[r + 1] -= x;
    }

    vector<int> compute() const {
        vector<int> ans(sz(psum));
        partial_sum(begin(psum), end(psum), ans.begin());
        return ans;
    }
};

const int maxn = 2e5 + 5;

int k, n, karr[maxn];

void init(int _k, vector<int> arr) {
    k = _k;
    n = sz(arr);
    bool vis[n] {};
    auto irange = [&](int x, int y) -> bool {
        if (x + k >= n && y < x + k - n) {
            return true;
        }
        return x <= y && y < x + k;
    };
    for (int i = 0; i < n; i++) {
        PS ps(n * 2);
        for (int j = 0; j < n; j++) {
            if (!vis[j] && !arr[j]) {
                ps.add(j + 1, j + k - 1, 1);
            }
        }
        auto psv = ps.compute();
        for (int j = 0; j < n; j++) {
            if (!psv[j] && !psv[j + n] && !arr[j]) {
                karr[j] = -i;
                vis[j] = true;
                for (int a = 0; a < n; a++) {
                    if (irange(a, j)) {
                        arr[a]--;
                    }
                }
                break;
            }
        }
    }
}

int compare_plants(int x, int y) {
    if (karr[x] > karr[y]) {
        return 1;
    } else {
        return -1;
    }
}

• Subtask 1: 0 / 5
• Subtask 2: 14 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25