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답안 #557097

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
557097 2022-05-04T17:57:35 Z Jomnoi Examination (JOI19_examination) C++17
100 / 100
 221 ms 13364 KB 
#include <bits/stdc++.h>
using namespace std;

const int MAX_N = 1e5 + 10;
const int MAX_Q = 1e5 + 10;

int S[MAX_N], T[MAX_N];
int X[MAX_Q], Y[MAX_Q], Z[MAX_Q], ans[MAX_Q];
vector <int> A, B, C;
vector <int> update, query;

class FenwickTree {
private :
    int N;
    vector <int> tree;
public :
    FenwickTree() {}
    FenwickTree(int n) : N(n), tree(N + 1, 0) {}

    void add(int x, int v) {
        for(int i = x; i <= N; i += (i & -i)) {
            tree[i] += v;
        }
    }

    int get(int x) {
        int res = 0;
        for(int i = x; i >= 1; i -= (i & -i)) {
            res += tree[i];
        }
        return res;
    }
};

int getIndex(vector <int> &a, int x) {
    return lower_bound(a.begin(), a.end(), x) - a.begin() + 1;
}

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int N, Q;
    cin >> N >> Q;
    for(int i = 1; i <= N; i++) {
        cin >> S[i] >> T[i];
        A.push_back(S[i]);
        B.push_back(T[i]);
        C.push_back(S[i] + T[i]);
    }
    for(int i = 1; i <= Q; i++) {
        cin >> X[i] >> Y[i] >> Z[i];
        A.push_back(X[i]);
        B.push_back(Y[i]);
        C.push_back(S[i] + T[i]);
    }

    sort(A.begin(), A.end());
    sort(B.begin(), B.end());
    sort(C.begin(), C.end());
    A.resize(unique(A.begin(), A.end()) - A.begin());
    B.resize(unique(B.begin(), B.end()) - B.begin());
    C.resize(unique(C.begin(), C.end()) - C.begin());

    int j;
    FenwickTree fwA, fwB;
    update.resize(N);
    iota(update.begin(), update.end(), 1);

    // X + Y >= Z
    fwB = FenwickTree(B.size());
    query.clear();
    for(int i = 1; i <= Q; i++) {
        if(X[i] + Y[i] >= Z[i]) {
            query.push_back(i);
        }
    }

    sort(update.begin(), update.end(), [&](const int &a, const int &b) {
        return S[a] > S[b];
    });
    sort(query.begin(), query.end(), [&](const int &a, const int &b) {
        return X[a] > X[b];
    });

    j = 0;
    for(auto i : query) {
        while(j < N and S[update[j]] >= X[i]) {
            fwB.add(getIndex(B, T[update[j]]), 1);
            j++;
        }

        ans[i] = j - fwB.get(getIndex(B, Y[i]) - 1);
    }

    // X + Y < Z
    fwA = FenwickTree(A.size());
    fwB = FenwickTree(B.size());
    query.clear();
    for(int i = 1; i <= Q; i++) {
        if(X[i] + Y[i] < Z[i]) {
            query.push_back(i);
        }
    }

    sort(update.begin(), update.end(), [&](const int &a, const int &b) {
        return S[a] + T[a] > S[b] + T[b];
    });
    sort(query.begin(), query.end(), [&](const int &a, const int &b) {
        return Z[a] > Z[b];
    });

    j = 0;
    for(auto i : query) {
        while(j < N and S[update[j]] + T[update[j]] >= Z[i]) {
            fwA.add(getIndex(A, S[update[j]]), 1);
            fwB.add(getIndex(B, T[update[j]]), 1);
            j++;
        }

        ans[i] += j - fwA.get(getIndex(A, X[i]) - 1) - fwB.get(getIndex(B, Y[i]) - 1);
    }

    for(int i = 1; i <= Q; i++) {
        cout << ans[i] << '\n';
    }
    return 0;
}

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 5 ms 728 KB Output is correct
8 Correct 5 ms 724 KB Output is correct
9 Correct 5 ms 724 KB Output is correct
10 Correct 4 ms 596 KB Output is correct
11 Correct 4 ms 596 KB Output is correct
12 Correct 3 ms 596 KB Output is correct
13 Correct 4 ms 724 KB Output is correct
14 Correct 4 ms 724 KB Output is correct
15 Correct 5 ms 716 KB Output is correct
16 Correct 3 ms 684 KB Output is correct
17 Correct 3 ms 596 KB Output is correct
18 Correct 2 ms 596 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 155 ms 10024 KB Output is correct
2 Correct 155 ms 10128 KB Output is correct
3 Correct 153 ms 10068 KB Output is correct
4 Correct 105 ms 8624 KB Output is correct
5 Correct 121 ms 8968 KB Output is correct
6 Correct 73 ms 7868 KB Output is correct
7 Correct 150 ms 9948 KB Output is correct
8 Correct 149 ms 9744 KB Output is correct
9 Correct 142 ms 9804 KB Output is correct
10 Correct 113 ms 8800 KB Output is correct
11 Correct 96 ms 8416 KB Output is correct
12 Correct 53 ms 7460 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 155 ms 10024 KB Output is correct
2 Correct 155 ms 10128 KB Output is correct
3 Correct 153 ms 10068 KB Output is correct
4 Correct 105 ms 8624 KB Output is correct
5 Correct 121 ms 8968 KB Output is correct
6 Correct 73 ms 7868 KB Output is correct
7 Correct 150 ms 9948 KB Output is correct
8 Correct 149 ms 9744 KB Output is correct
9 Correct 142 ms 9804 KB Output is correct
10 Correct 113 ms 8800 KB Output is correct
11 Correct 96 ms 8416 KB Output is correct
12 Correct 53 ms 7460 KB Output is correct
13 Correct 191 ms 10288 KB Output is correct
14 Correct 190 ms 10368 KB Output is correct
15 Correct 150 ms 9964 KB Output is correct
16 Correct 127 ms 8876 KB Output is correct
17 Correct 139 ms 9252 KB Output is correct
18 Correct 74 ms 7824 KB Output is correct
19 Correct 187 ms 10364 KB Output is correct
20 Correct 193 ms 10428 KB Output is correct
21 Correct 191 ms 10456 KB Output is correct
22 Correct 114 ms 8892 KB Output is correct
23 Correct 96 ms 8428 KB Output is correct
24 Correct 51 ms 7412 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 5 ms 728 KB Output is correct
8 Correct 5 ms 724 KB Output is correct
9 Correct 5 ms 724 KB Output is correct
10 Correct 4 ms 596 KB Output is correct
11 Correct 4 ms 596 KB Output is correct
12 Correct 3 ms 596 KB Output is correct
13 Correct 4 ms 724 KB Output is correct
14 Correct 4 ms 724 KB Output is correct
15 Correct 5 ms 716 KB Output is correct
16 Correct 3 ms 684 KB Output is correct
17 Correct 3 ms 596 KB Output is correct
18 Correct 2 ms 596 KB Output is correct
19 Correct 155 ms 10024 KB Output is correct
20 Correct 155 ms 10128 KB Output is correct
21 Correct 153 ms 10068 KB Output is correct
22 Correct 105 ms 8624 KB Output is correct
23 Correct 121 ms 8968 KB Output is correct
24 Correct 73 ms 7868 KB Output is correct
25 Correct 150 ms 9948 KB Output is correct
26 Correct 149 ms 9744 KB Output is correct
27 Correct 142 ms 9804 KB Output is correct
28 Correct 113 ms 8800 KB Output is correct
29 Correct 96 ms 8416 KB Output is correct
30 Correct 53 ms 7460 KB Output is correct
31 Correct 191 ms 10288 KB Output is correct
32 Correct 190 ms 10368 KB Output is correct
33 Correct 150 ms 9964 KB Output is correct
34 Correct 127 ms 8876 KB Output is correct
35 Correct 139 ms 9252 KB Output is correct
36 Correct 74 ms 7824 KB Output is correct
37 Correct 187 ms 10364 KB Output is correct
38 Correct 193 ms 10428 KB Output is correct
39 Correct 191 ms 10456 KB Output is correct
40 Correct 114 ms 8892 KB Output is correct
41 Correct 96 ms 8428 KB Output is correct
42 Correct 51 ms 7412 KB Output is correct
43 Correct 216 ms 13108 KB Output is correct
44 Correct 213 ms 13140 KB Output is correct
45 Correct 203 ms 13364 KB Output is correct
46 Correct 132 ms 10512 KB Output is correct
47 Correct 152 ms 10744 KB Output is correct
48 Correct 77 ms 7672 KB Output is correct
49 Correct 206 ms 13008 KB Output is correct
50 Correct 221 ms 13184 KB Output is correct
51 Correct 216 ms 13020 KB Output is correct
52 Correct 137 ms 10704 KB Output is correct
53 Correct 102 ms 10012 KB Output is correct