oj.uz

답안 #330083

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
330083 2020-11-23T19:15:28 Z Falcon Examination (JOI19_examination) C++17
100 / 100
 490 ms 26860 KB 
#pragma GCC optimize("O2")

#include <bits/stdc++.h>

using namespace std;

#define all(c)              (c).begin(), (c).end()
#define rall(c)             (c).rbegin(), (c).rend()
#define traverse(c, it)     for(auto it = (c).begin(); it != (c).end(); ++it)
#define rep(i, N)           for(int i = 0; i < (N); ++i)
#define rrep(i, N)          for(int i = (N) - 1; i >= 0; --i)
#define rep1(i, N)          for(int i = 1; i <= (N); ++i)
#define rep2(i, s, e)       for(int i = (s); i <= (e); ++i)
#define rep3(i, s, e, d)    for(int i = (s); (d) >= 0 ? i <= (e) : i >= (e); i += (d))

#ifdef DEBUG
#define debug(x...)         { \
                            ++dbg::depth; \
                            string dbg_vals = dbg::to_string(x); \
                            --dbg::depth; \
                            dbg::fprint(__func__, __LINE__, #x, dbg_vals); \
                            }

#define light_debug(x)      { \
                            dbg::light = true; \
                            dbg::dout << __func__ << ":" << __LINE__; \
                            dbg::dout << "  " << #x << " = " << x << endl; \
                            dbg::light = false; \
                            }
#else
#define debug(x...)         42
#define light_debug(x)      42
#endif


using ll = long long;

template<typename T>
inline T& ckmin(T& a, T b) { return a = a > b ? b : a; }

template<typename T>
inline T& ckmax(T& a, T b) { return a = a < b ? b : a; }

struct fenwick_tree {
    int n;
    vector<int> a;
    vector<int> u;

    fenwick_tree(int n_ = 0) : n{n_}, a(n + 1) {}

    void update(int i) {
        for(++i; i <= n; i += i & -i)
            ++a[i], u.push_back(i);
    }

    int pref(int i) const {
        int s{};
        for(++i; i > 0; i -= i & -i)
            s += a[i];
        return s;
    }

    int query(int s, int e) const {
        return pref(e) - pref(s - 1);
    }

    void clear() {
        for(int x : u) a[x] = 0;
        u.clear();
    }
};

struct point {
    int x, y, z, i{-1};
};

namespace std {
    string to_string(const point& p) {
        ostringstream ss;
        ss << "{" << p.x << ", " << p.y << ", " << p.z << ", " << p.i << "}";
        return ss.str();
    }
};

#ifdef DEBUG
#include "debug.hpp"
#endif


int N, Q, M{};
vector<int> ans;
vector<point> points;

fenwick_tree bit;

using it = vector<point>::iterator;
void cdq_dnc(const it s, const it e) {
    if(e - s == 1) return;
    it m = s + (e - s) / 2;
    cdq_dnc(s, m), cdq_dnc(m, e);

    vector<point> tmp; tmp.reserve(e - s);
    for(auto i = s, j = m; i < m || j < e; ) {
        if(i != m && (j == e || i->y >= j->y)) {
            tmp.push_back(*i);
            if(i->i == -1)
                bit.update(i->z);
            ++i;
        } else {
            tmp.push_back(*j);
            if(j->i >= 0) 
                ans[j->i] += bit.query(j->z, M - 1);
            ++j;
        }
    }

    bit.clear();
    for(auto i = tmp.begin(), j = s; j < e; ++i, ++j)
        *j = *i;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    
    #ifdef DEBUG
    freopen("debug", "w", stderr);
    #endif

    cin >> N >> Q; points.reserve(N + Q), ans.resize(Q);
    rep(i, N) {
        int S, T; cin >> S >> T;
        points.push_back(point{S, T, S + T, -1});
    }

    rep(i, Q) {
        int X, Y, Z; cin >> X >> Y >> Z;
        points.push_back(point{X, Y, Z, i});
    }

    sort(all(points), [](const point& p, const point& q) {
        return p.x > q.x || (p.x == q.x && p.y > q.y)
            || (p.x == q.x && p.y == q.y && p.z > q.z)
            || (p.x == q.x && p.y == q.y && p.z == q.z && p.i < q.i);
    });

    map<int, int> mp;
    for(const auto& p : points) mp[p.z];
    for(auto& p : mp) p.second = M++; 
    for(auto& p : points) p.z = mp[p.z];

    bit = fenwick_tree(M);
    cdq_dnc(all(points));
    
    rep(i, Q) cout << ans[i] << '\n';

    #ifdef DEBUG
    dbg::dout << "\nExecution time: " << clock() * 1000 / CLOCKS_PER_SEC  << "ms" << endl;
    #endif

    return 0;
}

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 9 ms 876 KB Output is correct
8 Correct 8 ms 1004 KB Output is correct
9 Correct 8 ms 876 KB Output is correct
10 Correct 7 ms 876 KB Output is correct
11 Correct 7 ms 876 KB Output is correct
12 Correct 4 ms 620 KB Output is correct
13 Correct 8 ms 876 KB Output is correct
14 Correct 7 ms 944 KB Output is correct
15 Correct 7 ms 1004 KB Output is correct
16 Correct 5 ms 876 KB Output is correct
17 Correct 7 ms 1132 KB Output is correct
18 Correct 3 ms 620 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 274 ms 14048 KB Output is correct
2 Correct 277 ms 13888 KB Output is correct
3 Correct 266 ms 13920 KB Output is correct
4 Correct 217 ms 13248 KB Output is correct
5 Correct 262 ms 13408 KB Output is correct
6 Correct 118 ms 9844 KB Output is correct
7 Correct 261 ms 15524 KB Output is correct
8 Correct 256 ms 13920 KB Output is correct
9 Correct 257 ms 15436 KB Output is correct
10 Correct 227 ms 12252 KB Output is correct
11 Correct 215 ms 13276 KB Output is correct
12 Correct 95 ms 9588 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 274 ms 14048 KB Output is correct
2 Correct 277 ms 13888 KB Output is correct
3 Correct 266 ms 13920 KB Output is correct
4 Correct 217 ms 13248 KB Output is correct
5 Correct 262 ms 13408 KB Output is correct
6 Correct 118 ms 9844 KB Output is correct
7 Correct 261 ms 15524 KB Output is correct
8 Correct 256 ms 13920 KB Output is correct
9 Correct 257 ms 15436 KB Output is correct
10 Correct 227 ms 12252 KB Output is correct
11 Correct 215 ms 13276 KB Output is correct
12 Correct 95 ms 9588 KB Output is correct
13 Correct 392 ms 16476 KB Output is correct
14 Correct 366 ms 15840 KB Output is correct
15 Correct 267 ms 14044 KB Output is correct
16 Correct 300 ms 14564 KB Output is correct
17 Correct 299 ms 14768 KB Output is correct
18 Correct 121 ms 10868 KB Output is correct
19 Correct 377 ms 19468 KB Output is correct
20 Correct 362 ms 19040 KB Output is correct
21 Correct 372 ms 21792 KB Output is correct
22 Correct 211 ms 13812 KB Output is correct
23 Correct 218 ms 14948 KB Output is correct
24 Correct 96 ms 10484 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 9 ms 876 KB Output is correct
8 Correct 8 ms 1004 KB Output is correct
9 Correct 8 ms 876 KB Output is correct
10 Correct 7 ms 876 KB Output is correct
11 Correct 7 ms 876 KB Output is correct
12 Correct 4 ms 620 KB Output is correct
13 Correct 8 ms 876 KB Output is correct
14 Correct 7 ms 944 KB Output is correct
15 Correct 7 ms 1004 KB Output is correct
16 Correct 5 ms 876 KB Output is correct
17 Correct 7 ms 1132 KB Output is correct
18 Correct 3 ms 620 KB Output is correct
19 Correct 274 ms 14048 KB Output is correct
20 Correct 277 ms 13888 KB Output is correct
21 Correct 266 ms 13920 KB Output is correct
22 Correct 217 ms 13248 KB Output is correct
23 Correct 262 ms 13408 KB Output is correct
24 Correct 118 ms 9844 KB Output is correct
25 Correct 261 ms 15524 KB Output is correct
26 Correct 256 ms 13920 KB Output is correct
27 Correct 257 ms 15436 KB Output is correct
28 Correct 227 ms 12252 KB Output is correct
29 Correct 215 ms 13276 KB Output is correct
30 Correct 95 ms 9588 KB Output is correct
31 Correct 392 ms 16476 KB Output is correct
32 Correct 366 ms 15840 KB Output is correct
33 Correct 267 ms 14044 KB Output is correct
34 Correct 300 ms 14564 KB Output is correct
35 Correct 299 ms 14768 KB Output is correct
36 Correct 121 ms 10868 KB Output is correct
37 Correct 377 ms 19468 KB Output is correct
38 Correct 362 ms 19040 KB Output is correct
39 Correct 372 ms 21792 KB Output is correct
40 Correct 211 ms 13812 KB Output is correct
41 Correct 218 ms 14948 KB Output is correct
42 Correct 96 ms 10484 KB Output is correct
43 Correct 463 ms 25436 KB Output is correct
44 Correct 490 ms 25344 KB Output is correct
45 Correct 448 ms 25184 KB Output is correct
46 Correct 381 ms 23776 KB Output is correct
47 Correct 389 ms 23980 KB Output is correct
48 Correct 130 ms 10728 KB Output is correct
49 Correct 436 ms 26860 KB Output is correct
50 Correct 456 ms 25312 KB Output is correct
51 Correct 438 ms 26524 KB Output is correct
52 Correct 363 ms 23252 KB Output is correct
53 Correct 230 ms 17764 KB Output is correct