oj.uz

답안 #715889

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
715889 2023-03-28T10:48:34 Z tengiz05 Rabbit Carrot (LMIO19_triusis) C++17
14 / 100
 1000 ms 340 KB 
#include <bits/stdc++.h>

using i64 = long long;

constexpr int inf = 2001111111;

struct SegmentTree {
    int n;
    std::vector<int> mn, mn2;
    SegmentTree(int n) : n(n), mn(4 * n, -inf), mn2(4 * n, inf) {}
    void push(int p) {
        mn[2 * p] = std::max(mn[2 * p], mn[p]);
        mn[2 * p + 1] = std::max(mn[2 * p + 1], mn[p]);
    }
    void modify(int p, int l, int r, int x, int y) {
        if (l == r - 1) {
            mn[p] = y;
            mn2[p] = inf;
        } else {
            int m = (l + r) / 2;
            push(p);
            if (x < m) {
                modify(2 * p, l, m, x, y);
            } else {
                modify(2 * p + 1, m, r, x, y);
            }
            mn[p] = std::min(mn[2 * p], mn[2 * p + 1]);
            if (mn[2 * p] == mn[2 * p + 1]) {
                mn2[p] = std::min(mn2[2 * p], mn2[2 * p + 1]);
            } else if (mn[2 * p] == mn[p]) {
                mn2[p] = std::min(mn2[2 * p], mn[2 * p + 1]);
            } else {
                mn2[p] = std::min(mn[2 * p], mn2[2 * p + 1]);
            }
        }
    }
    void modify(int x, int y) {
        modify(1, 0, n, x, y);
    }
    void chmax(int p, int l, int r, int x, int y, int v) {
        if (y <= l || r <= x || v <= mn[p]) return;
        if (x <= l && r <= y && v < mn2[p]) { // could be here
            mn[p] = v;
            return;
        }
        int m = (l + r) / 2;
        push(p);
        chmax(2 * p, l, m, x, y, v);
        chmax(2 * p + 1, m, r, x, y, v);
        mn[p] = std::min(mn[2 * p], mn[2 * p + 1]);
        if (mn[2 * p] == mn[2 * p + 1]) {
            mn2[p] = std::min(mn2[2 * p], mn2[2 * p + 1]);
        } else if (mn[2 * p] == mn[p]) {
            mn2[p] = std::min(mn2[2 * p], mn[2 * p + 1]);
        } else {
            mn2[p] = std::min(mn[2 * p], mn2[2 * p + 1]);
        }
    }
    void chmax(int l, int r, int v) {
        //~ for (int i = l; i < r; i++) {
            //~ modify(i, std::max(at(i), v));
        //~ }
        chmax(1, 0, n, l, r, v);
    }
    int at(int p, int l, int r, int x) {
        if (l == r - 1) {
            return mn[p];
        } else {
            int m = (l + r) / 2;
            push(p);
            if (x < m) {
                return at(2 * p, l, m, x);
            } else {
                return at(2 * p + 1, m, r, x);
            }
        }
    }
    int at(int x) {
        return at(1, 0, n, x);
    }
    void add(int l, int r, int v) {
        for (int i = l; i < r; i++) {
            modify(i, at(i) + v);
        }
    }
};

void chmax(int &a, int b) {
    if (a < b) {
        a = b;
    }
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int n, M;
    std::cin >> n >> M;
    
    std::vector<int> a(n);
    for (int i = 0; i < n; i++) {
        std::cin >> a[i];
    }
    
    SegmentTree s(n + 1);
    s.modify(n, 0);
    for (int i = 0; i < n; i++) {
        int lo = 0, hi = n + 1;
        while (lo + 1 < hi) {
            int m = (lo + hi) / 2;
            if (a[i] - s.at(m) <= M) {
                hi = m;
            } else {
                lo = m;
            }
        }
        //~ std::cout << hi << "\n";
        //~ for (int i = 0; i <= n; i++) {
            //~ std::cout << s.at(i) << " ";
        //~ } std::cout << "\n";
        s.add(0, n + 1, M);
        s.chmax(hi - 1, n, a[i]);
    }
    
    //~ for (int i = 0; i <= n; i++) {
        //~ std::cout << s.at(i) << " ";
    //~ } std::cout << "\n";
    for (int i = 0; i <= n; i++) {
        if (s.at(i) >= 0) {
            std::cout << i << "\n";
            return 0;
        }
    }
    assert(false);
    
    return 0;
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct

Subtask #2
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Execution timed out 1082 ms 340 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Execution timed out 1082 ms 340 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Execution timed out 1082 ms 340 KB Time limit exceeded
5 Halted 0 ms 0 KB -