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Submission #733371

# Submission time Handle Problem Language Result Execution time Memory
733371 2023-04-30T15:04:54 Z benjaminkleyn Examination (JOI19_examination) C++17
41 / 100
 170 ms 15076 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

struct Query
{
    int a, b, c, idx;
    Query() : a(0), b(0), c(0), idx(0) {}
    Query(int _a, int _b, int _c, int _idx) : a(_a), b(_b), c(_c), idx(_idx) {}
};

struct Student
{
    int s, t, idx;
    Student() : s(0), t(0), idx(0) {}
};

int n, q;

struct SegTree
{
    int t[1000000] = {0};
    SegTree() {}
    void update(int idx, int v = 1, int tl = 0, int tr = 200000)
    {
        if (tl == tr)
        {
            t[v]++;
            return;
        }
        int tm = (tl + tr) / 2;
        if (idx <= tm)
            update(idx, 2 * v, tl, tm);
        else
            update(idx, 2 * v + 1, tm + 1, tr);
        t[v] = t[2 * v] + t[2 * v + 1];
    }
    int query(int l, int r, int v = 1, int tl = 0, int tr = 200000)
    {
        if (l > r || r < tl || tr < l)
            return 0;
        if (l <= tl && tr <= r)
            return t[v];
        int tm = (tl + tr) / 2;
        return query(l, r, 2 * v, tl, tm) + query(l, r, 2 * v + 1, tm + 1, tr);
    }
};

int main()
{
    cin.tie(0)->sync_with_stdio(0);

    cin >> n >> q;

    vector<Student> students(n);
    for (Student &x : students)
        cin >> x.s >> x.t;

    vector<Query> type1, type2;
    for (int i = 0, a, b, c; i < q; i++)
    {
        cin >> a >> b >> c;
        if (a + b >= c)
            type1.push_back(Query(a, b, c, i));
        else
            type2.push_back(Query(a, b, c, i));
    }

    vector<int> res(q);

    SegTree seg1;
    sort(type1.begin(), type1.end(), [] (const Query &X, const Query &Y) {return X.a > Y.a;});
    sort(students.begin(), students.end(), [] (const Student &X, const Student &Y) {return X.s > Y.s;});
    int i = 0;
    for (const Query &Q : type1)
    {
        while (i < n && students[i].s >= Q.a)
            seg1.update(students[i++].t);
        res[Q.idx] = seg1.query(Q.b, 200000);
    }

    seg1 = SegTree();
    SegTree seg2;
    sort(type2.begin(), type2.end(), [] (const Query &X, const Query &Y) {return X.c > Y.c;});
    sort(students.begin(), students.end(), [] (const Student &X, const Student &Y) {return X.s + X.t > Y.s + Y.t;});
    i = 0;
    for (const Query &Q : type2)
    {
        while (i < n && students[i].s + students[i].t >= Q.c)
        {
            seg1.update(students[i].s);
            seg2.update(students[i].t);
            i++;
        }
        res[Q.idx] = seg1.query(Q.a, 200000) - seg2.query(0, Q.b - 1);
    }

    for (int j = 0; j < q; j++)
        cout << res[j] << '\n';


    return 0;
}

Subtask #1
0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8136 KB Output is correct
2 Correct 5 ms 8148 KB Output is correct
3 Correct 6 ms 8148 KB Output is correct
4 Incorrect 5 ms 8144 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 14280 KB Output is correct
2 Correct 135 ms 14312 KB Output is correct
3 Correct 122 ms 14280 KB Output is correct
4 Correct 97 ms 13540 KB Output is correct
5 Correct 111 ms 13548 KB Output is correct
6 Correct 70 ms 12768 KB Output is correct
7 Correct 120 ms 14224 KB Output is correct
8 Correct 103 ms 14160 KB Output is correct
9 Correct 118 ms 14092 KB Output is correct
10 Correct 109 ms 13312 KB Output is correct
11 Correct 75 ms 13520 KB Output is correct
12 Correct 61 ms 12468 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 14280 KB Output is correct
2 Correct 135 ms 14312 KB Output is correct
3 Correct 122 ms 14280 KB Output is correct
4 Correct 97 ms 13540 KB Output is correct
5 Correct 111 ms 13548 KB Output is correct
6 Correct 70 ms 12768 KB Output is correct
7 Correct 120 ms 14224 KB Output is correct
8 Correct 103 ms 14160 KB Output is correct
9 Correct 118 ms 14092 KB Output is correct
10 Correct 109 ms 13312 KB Output is correct
11 Correct 75 ms 13520 KB Output is correct
12 Correct 61 ms 12468 KB Output is correct
13 Correct 170 ms 14716 KB Output is correct
14 Correct 133 ms 14824 KB Output is correct
15 Correct 104 ms 14276 KB Output is correct
16 Correct 104 ms 13932 KB Output is correct
17 Correct 134 ms 13924 KB Output is correct
18 Correct 88 ms 12912 KB Output is correct
19 Correct 158 ms 14724 KB Output is correct
20 Correct 160 ms 14696 KB Output is correct
21 Correct 166 ms 15076 KB Output is correct
22 Correct 108 ms 13412 KB Output is correct
23 Correct 73 ms 13396 KB Output is correct
24 Correct 61 ms 12412 KB Output is correct

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8136 KB Output is correct
2 Correct 5 ms 8148 KB Output is correct
3 Correct 6 ms 8148 KB Output is correct
4 Incorrect 5 ms 8144 KB Output isn't correct
5 Halted 0 ms 0 KB -