Submission #159307

#	Time	Username	Problem	Language	Result	Execution time	Memory
159307		TAISA_	Wall (IOI14_wall)	C++14	8 / 100	178 ms	14072 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;
struct Segtree {
    int n;
    vector<pair<int, P>> dat;
    vector<int> s;
    Segtree(int n_) {
        n = 1;
        while (n < n_) {
            n <<= 1;
        }
        dat.resize(2 * n, make_pair(-1, P(-1, -1)));
        s.resize(2 * n, -1);
    }
    void upd(int a, int b, P x, int t, int k, int l, int r) {
        if (b <= l || r <= a) {
            return;
        }
        if (a <= l && r <= b) {
            if (x.second == 1) {
                if (s[k] < x.first) {
                    dat[k] = make_pair(t, x);
                    s[k] = x.first;
                }
            } else {
                if (s[k] == -1 || s[k] > x.first) {
                    dat[k] = make_pair(t, x);
                    s[k] = x.first;
                }
            }
            return;
        }
        upd(a, b, x, t, k << 1, l, (l + r) >> 1);
        upd(a, b, x, t, k << 1 | 1, (l + r) >> 1, r);
    }
    void upd(int a, int b, P x, int t) { upd(a, b, x, t, 1, 0, n); }
    vector<pair<int, P>> get(int k) {
        k += n;
        vector<pair<int, P>> res;
        if (dat[k].first != -1) {
            res.push_back(dat[k]);
        }
        k >>= 1;
        while (k > 0) {
            if (dat[k].first != -1) {
                res.push_back(dat[k]);
            }
            k >>= 1;
        }
        sort(res.begin(), res.end());
        return res;
    }
};
void buildWall(int n, int k, int op[], int left[], int right[], int height[],
               int finalHeight[]) {
    if (k <= 5000 && n <= 10000) {
        for (int i = 0; i < n; i++) {
            finalHeight[i] = 0;
        }
        for (int i = 0; i < k; i++) {
            for (int j = left[i]; j <= right[i]; j++) {
                if (op[i] == 1) {
                    finalHeight[j] = max(finalHeight[j], height[i]);
                } else {
                    finalHeight[j] = min(finalHeight[j], height[i]);
                }
            }
        }
    } else {
        Segtree seg(n);
        for (int i = 0; i < k; i++) {
            seg.upd(left[i], right[i] + 1, P(height[i], op[i]), i);
        }
        for (int i = 0; i < n; i++) {
            int t = 0;
            vector<pair<int, P>> v = seg.get(i);
            for (auto &p : v) {
                if (p.second.second == 1) {
                    t = max(t, p.second.first);
                } else {
                    t = min(t, p.second.first);
                }
            }
            finalHeight[i] = t;
        }
    }
}

• Subtask 1: 8 / 8
• Subtask 2: 0 / 24
• Subtask 3: 0 / 29
• Subtask 4: 0 / 39