Submission #322592

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
322592	2020-11-15 01:59:56	arbor	Examination (JOI19_examination)	C++14	100 / 100	506 ms	11916 KiB

examination

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#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const int MN = 2e5 + 5;
int N, Q;
struct Point {
    int a, b, c, i;
} p[MN];
int b[MN], ans[MN];
void upd(int i, int v) {
    for (; i < MN; i += i & -i) b[i] += v;
}
int get(int i) {
    int r = 0;
    for (; i; i -= i & -i) r += b[i];
    return r;
}
void cdq(int l, int r) {
    if (l >= r) return;
    int m = (l + r) / 2;
    cdq(l, m), cdq(m + 1, r);
    sort(p + l, p + r + 1, [](Point x, Point y) {
        return x.a == y.a ? x.i < y.i : x.a > y.a;
    });
    for (int i = l; i <= r; i++) {
        if (p[i].c <= m && !p[i].i) upd(p[i].b, 1);
        if (p[i].c > m && p[i].i) ans[p[i].i] += get(2e5) - get(p[i].b - 1);
    }
 
 
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• Subtask 1: 2 / 2
• Subtask 2: 20 / 20
• Subtask 3: 21 / 21
• Subtask 4: 57 / 57