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답안 #1103030

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1103030 2024-10-19T13:00:21 Z vjudge1 Examination (JOI19_examination) C++17
100 / 100
 152 ms 14544 KB 
#include <bits/stdc++.h>

using namespace std;

#define sz(x) int(x.size())
#define all(x) begin(x), end(x)

struct Query {
    int a, b, c, idx;
};

struct FTree {
    int n;
    vector<int> ft;
    FTree(int _n) : n(_n + 5), ft(n, 0) {}
    void update(int p) {
        for (++p; p < n; p += p & -p) ft[p]++;
    }
    int query(int p) {
        int s = 0;
        for (++p; p > 0; p -= p & -p) s += ft[p];
        return s;
    }
    int query(int l, int r) {
        return query(r) - query(l - 1);
    }
};

int compress(const vector<int> &v, int x) {
    return int(lower_bound(all(v), x) - begin(v));
}

vector<int> compress(const vector<int> &x, vector<int> &v) {
    sort(all(v)); v.erase(unique(all(v)), end(v));
    vector<int> c(sz(x));
    for (int i = 0; i < sz(x); i++) {
        c[i] = compress(v, x[i]);
    }
    return c;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
	
    int n, q;
    cin >> n >> q;
    vector<int> s(n), t(n);
    for (int i = 0; i < n; i++) {
        cin >> s[i] >> t[i];
    }
    
    vector<int> v_s = s, v_t = t;
    vector<Query> v[2];
    for (int i = 0; i < q; i++) {
        Query x; cin >> x.a >> x.b >> x.c; x.idx = i;
        v_s.push_back(x.a); v_t.push_back(x.b);
        v[x.a + x.b < x.c].push_back(x);
    }
    
    vector<int> s_comp = compress(s, v_s), t_comp = compress(t, v_t);
    const int M = max(sz(v_s), sz(v_t));
    
    vector<int> res(q);
    //v[0] -> la diagonal queda abajo
    //es lo mismo que s[i] >= x.a y t[i] >= x.b
    //lo primero uso sweep line y lo segundo un fenwick
    sort(all(v[0]), [](const Query &lhs, const Query &rhs) {
        return lhs.a > rhs.a;
    });
    vector<int> p(n); iota(all(p), 0);
    sort(all(p), [&](const int &lhs, const int &rhs) {
        return s[lhs] > s[rhs];
    });
    FTree ft(M);
    int i = 0;
    for (Query x : v[0]) {
        while (i < n && s[p[i]] >= x.a) {
            ft.update(t_comp[p[i]]);
            i++;
        }
        res[x.idx] = ft.query(compress(v_t, x.b), M);
    }
    
    //v[1] -> la diagonal queda arriba
    //si s[i] + t[i] >= x.c > x.a + x.b entonces s[i] >= x.a (1) ó t[i] >= x.b (2)
    //total = (1) + (2) - (1 y 2)
    //(1 y 2) = (1) + (2) - total
    FTree ftA(M), ftB(M);
    sort(all(v[1]), [](const Query &lhs, const Query &rhs) {
        return lhs.c > rhs.c;
    });
    sort(all(p), [&](const int &lhs, const int &rhs) {
        return s[lhs] + t[lhs] > s[rhs] + t[rhs];
    });
    i = 0;
    for (Query x : v[1]) {
        while (i < n && s[p[i]] + t[p[i]] >= x.c) {
            ftA.update(s_comp[p[i]]);
            ftB.update(t_comp[p[i]]);
            i++;
        }
        res[x.idx] = ftA.query(compress(v_s, x.a), M) + ftB.query(compress(v_t, x.b), M) - i;
    }
    
    for (int i = 0; i < q; i++) {
        cout << res[i] << '\n';
    }
    
    return 0;
}

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 6 ms 848 KB Output is correct
8 Correct 6 ms 848 KB Output is correct
9 Correct 4 ms 848 KB Output is correct
10 Correct 4 ms 592 KB Output is correct
11 Correct 4 ms 592 KB Output is correct
12 Correct 3 ms 592 KB Output is correct
13 Correct 4 ms 848 KB Output is correct
14 Correct 4 ms 848 KB Output is correct
15 Correct 4 ms 848 KB Output is correct
16 Correct 3 ms 592 KB Output is correct
17 Correct 4 ms 592 KB Output is correct
18 Correct 3 ms 676 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 123 ms 7932 KB Output is correct
2 Correct 123 ms 7988 KB Output is correct
3 Correct 124 ms 10288 KB Output is correct
4 Correct 92 ms 9692 KB Output is correct
5 Correct 93 ms 9520 KB Output is correct
6 Correct 58 ms 7996 KB Output is correct
7 Correct 127 ms 10288 KB Output is correct
8 Correct 117 ms 10288 KB Output is correct
9 Correct 116 ms 10032 KB Output is correct
10 Correct 93 ms 9532 KB Output is correct
11 Correct 86 ms 9520 KB Output is correct
12 Correct 48 ms 7420 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 123 ms 7932 KB Output is correct
2 Correct 123 ms 7988 KB Output is correct
3 Correct 124 ms 10288 KB Output is correct
4 Correct 92 ms 9692 KB Output is correct
5 Correct 93 ms 9520 KB Output is correct
6 Correct 58 ms 7996 KB Output is correct
7 Correct 127 ms 10288 KB Output is correct
8 Correct 117 ms 10288 KB Output is correct
9 Correct 116 ms 10032 KB Output is correct
10 Correct 93 ms 9532 KB Output is correct
11 Correct 86 ms 9520 KB Output is correct
12 Correct 48 ms 7420 KB Output is correct
13 Correct 139 ms 10300 KB Output is correct
14 Correct 129 ms 11028 KB Output is correct
15 Correct 128 ms 10436 KB Output is correct
16 Correct 104 ms 9536 KB Output is correct
17 Correct 105 ms 9528 KB Output is correct
18 Correct 62 ms 7984 KB Output is correct
19 Correct 146 ms 10332 KB Output is correct
20 Correct 137 ms 9268 KB Output is correct
21 Correct 140 ms 11312 KB Output is correct
22 Correct 88 ms 9548 KB Output is correct
23 Correct 77 ms 8752 KB Output is correct
24 Correct 39 ms 7560 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 6 ms 848 KB Output is correct
8 Correct 6 ms 848 KB Output is correct
9 Correct 4 ms 848 KB Output is correct
10 Correct 4 ms 592 KB Output is correct
11 Correct 4 ms 592 KB Output is correct
12 Correct 3 ms 592 KB Output is correct
13 Correct 4 ms 848 KB Output is correct
14 Correct 4 ms 848 KB Output is correct
15 Correct 4 ms 848 KB Output is correct
16 Correct 3 ms 592 KB Output is correct
17 Correct 4 ms 592 KB Output is correct
18 Correct 3 ms 676 KB Output is correct
19 Correct 123 ms 7932 KB Output is correct
20 Correct 123 ms 7988 KB Output is correct
21 Correct 124 ms 10288 KB Output is correct
22 Correct 92 ms 9692 KB Output is correct
23 Correct 93 ms 9520 KB Output is correct
24 Correct 58 ms 7996 KB Output is correct
25 Correct 127 ms 10288 KB Output is correct
26 Correct 117 ms 10288 KB Output is correct
27 Correct 116 ms 10032 KB Output is correct
28 Correct 93 ms 9532 KB Output is correct
29 Correct 86 ms 9520 KB Output is correct
30 Correct 48 ms 7420 KB Output is correct
31 Correct 139 ms 10300 KB Output is correct
32 Correct 129 ms 11028 KB Output is correct
33 Correct 128 ms 10436 KB Output is correct
34 Correct 104 ms 9536 KB Output is correct
35 Correct 105 ms 9528 KB Output is correct
36 Correct 62 ms 7984 KB Output is correct
37 Correct 146 ms 10332 KB Output is correct
38 Correct 137 ms 9268 KB Output is correct
39 Correct 140 ms 11312 KB Output is correct
40 Correct 88 ms 9548 KB Output is correct
41 Correct 77 ms 8752 KB Output is correct
42 Correct 39 ms 7560 KB Output is correct
43 Correct 146 ms 13564 KB Output is correct
44 Correct 146 ms 13620 KB Output is correct
45 Correct 140 ms 14396 KB Output is correct
46 Correct 104 ms 12096 KB Output is correct
47 Correct 112 ms 11932 KB Output is correct
48 Correct 57 ms 8240 KB Output is correct
49 Correct 141 ms 13620 KB Output is correct
50 Correct 147 ms 14544 KB Output is correct
51 Correct 152 ms 14384 KB Output is correct
52 Correct 102 ms 11828 KB Output is correct
53 Correct 84 ms 11568 KB Output is correct