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Submission #328920

# Submission time Handle Problem Language Result Execution time Memory
328920 2020-11-18T13:05:11 Z dolphingarlic Examination (JOI19_examination) C++14
2 / 100
 3000 ms 15212 KB 
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;

const int B = 1000;

int n, q;
ll s[100001], t[100001], sum_compressed[100001];
vector<ll> has_sum;
pair<ll, int> by_s[100001], by_t[100001];
tuple<ll, ll, ll, int> queries[100001];
int bit[100001];
int ans[100001];

void update(int pos, int val) {
    for (; pos <= n; pos += pos & -pos) bit[pos] += val;
}

int query(int l, int r) {
    int ans = 0;
    for (; r; r -= r & -r) ans += bit[r];
    for (l--; l; l -= l & -l) ans -= bit[l];
    return ans;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> q;
    for (int i = 0; i < n; i++) {
        cin >> s[i] >> t[i];
        has_sum.push_back(s[i] + t[i]);
        by_s[i] = {s[i], i};
        by_t[i] = {t[i], i};
    }
    for (int i = 0; i < q; i++) {
        ll a, b, c;
        cin >> a >> b >> c;
        queries[i] = {a, b, c, i};
    }
    sort(has_sum.begin(), has_sum.end());
    has_sum.erase(unique(has_sum.begin(), has_sum.end()), has_sum.end());
    for (int i = 0; i < n; i++) {
        sum_compressed[i] = lower_bound(has_sum.begin(), has_sum.end(), s[i] + t[i]) - has_sum.begin() + 1;
    }
    sort(by_s, by_s + n);
    sort(by_t, by_t + n);
    sort(queries, queries + q, greater<tuple<ll, ll, ll, int>>());

    map<int, int> good_cnt;
    for (int i = 0, sptr = n, tptr = n; i < q; i += B) {
        sort(queries + i, queries + min(q, i + B), [](tuple<ll, ll, ll, int> A, tuple<ll, ll, ll, int> B) {
            return get<1>(A) > get<1>(B);
        });
        for (int j = i; j < min(q, i + B); j++) {
            ll a, b, c, idx;
            tie(a, b, c, idx) = queries[j];

            while (sptr && by_s[sptr - 1].first >= a) {
                good_cnt[by_s[sptr - 1].second]++;
                if (good_cnt[by_s[sptr - 1].second] == 2) {
                    update(sum_compressed[by_s[sptr - 1].second], 1);
                }
                sptr--;
            }
            while (sptr != n && by_s[sptr].first < a) {
                good_cnt[by_s[sptr].second]--;
                if (good_cnt[by_s[sptr].second] == 1) {
                    update(sum_compressed[by_s[sptr].second], -1);
                }
                sptr++;
            }
            while (tptr && by_t[tptr - 1].first >= b) {
                good_cnt[by_t[tptr - 1].second]++;
                if (good_cnt[by_t[tptr - 1].second] == 2) {
                    update(sum_compressed[by_t[tptr - 1].second], 1);
                }
                tptr--;
            }
            while (tptr != n && by_t[tptr].first < b) {
                good_cnt[by_t[tptr].second]--;
                if (good_cnt[by_t[tptr].second] == 1) {
                    update(sum_compressed[by_t[tptr].second], -1);
                }
                tptr++;
            }

            int ub = lower_bound(has_sum.begin(), has_sum.end(), c) - has_sum.begin() + 1;
            ans[idx] = query(ub, n);
        }
    }

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

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 175 ms 876 KB Output is correct
8 Correct 172 ms 876 KB Output is correct
9 Correct 172 ms 1004 KB Output is correct
10 Correct 149 ms 1004 KB Output is correct
11 Correct 142 ms 1004 KB Output is correct
12 Correct 33 ms 876 KB Output is correct
13 Correct 172 ms 876 KB Output is correct
14 Correct 176 ms 1004 KB Output is correct
15 Correct 182 ms 876 KB Output is correct
16 Correct 8 ms 876 KB Output is correct
17 Correct 82 ms 876 KB Output is correct
18 Correct 11 ms 888 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3079 ms 15212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3079 ms 15212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 175 ms 876 KB Output is correct
8 Correct 172 ms 876 KB Output is correct
9 Correct 172 ms 1004 KB Output is correct
10 Correct 149 ms 1004 KB Output is correct
11 Correct 142 ms 1004 KB Output is correct
12 Correct 33 ms 876 KB Output is correct
13 Correct 172 ms 876 KB Output is correct
14 Correct 176 ms 1004 KB Output is correct
15 Correct 182 ms 876 KB Output is correct
16 Correct 8 ms 876 KB Output is correct
17 Correct 82 ms 876 KB Output is correct
18 Correct 11 ms 888 KB Output is correct
19 Execution timed out 3079 ms 15212 KB Time limit exceeded
20 Halted 0 ms 0 KB -