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Submission #260115

# Submission time Handle Problem Language Result Execution time Memory
260115 2020-08-09T10:43:08 Z islingr Street Lamps (APIO19_street_lamps) C++17
100 / 100
 3826 ms 60880 KB 
#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for (auto i = (a); i < (b); ++i)

const int N = 1 << 19;
struct E { bool ask; int l, r, t, del; } a[3 * N], b[3 * N];
int q, ans[N];

void cdq2(int l, int r) {
	if (r - l == 1) return;
	int m = (l + r) >> 1;
	cdq2(l, m); cdq2(m, r);
	rep(i, l, r) b[i].r = i < m;
	inplace_merge(b + l, b + m, b + r, [&](E a, E b) { return a.t < b.t; });
	int s = 0;
	rep(i, l, r) {
		if (!b[i].ask && b[i].l && b[i].r) s += b[i].del * b[i].t;
		if (b[i].ask && !b[i].l && !b[i].r) ans[b[i].t] += s;
	}
}

void cdq1(int l, int r) {
	if (r - l == 1) return;
	int m = (l + r) >> 1;
	cdq1(l, m); cdq1(m, r);
	rep(i, l, r) a[i].l = i < m;
	merge(a + l, a + m, a + m, a + r, b + l, [&](E a, E b) { return pair(-a.r, a.ask) < pair(-b.r, b.ask); });
	rep(i, l, r) a[i] = b[i];
	cdq2(l, r);
}

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	int n, p = 0; cin >> n >> q; int pre = -1;
	set<int> z = {-1};
	rep(i, 0, n) {
		char c; cin >> c;
		if (c != '0') {
			if (p && a[p - 1].r == i) a[p - 1].r = i + 1;
			else a[p++] = {0, pre + 1, i + 1, -1, -1};
		} else z.insert(pre = i);
	}
	z.insert(n);

	rep(t, 0, q) {
		string s; cin >> s;
		if (s == "toggle") {
			int i; cin >> i; --i;
			auto [it, f] = z.insert(i);
			int d = f ? +1 : -1;
			a[p++] = {0, *prev(it) + 1, *next(it), t, +d};
			a[p++] = {0, *prev(it) + 1, i, t, -d};
			a[p++] = {0, i + 1, *next(it), t, -d};
			if (d < 0) z.erase(it);
			ans[t] = -1;
		} else {
			int l, r; cin >> l >> r; --l; --r;
			a[p++] = {1, l, r, t, 0};
			ans[t] = *z.lower_bound(l) < r ? 0 : t;
		}
	}

	sort(a, a + p, [&](E a, E b) { return pair(a.l, a.ask) < pair(b.l, b.ask); });
	cdq1(0, p);
	rep(t, 0, q) if (0 <= ans[t]) cout << ans[t] << '\n';
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2543 ms 33792 KB Output is correct
2 Correct 2740 ms 33804 KB Output is correct
3 Correct 2804 ms 34080 KB Output is correct
4 Correct 3224 ms 44876 KB Output is correct
5 Correct 3055 ms 40228 KB Output is correct
6 Correct 2997 ms 48108 KB Output is correct
7 Correct 1487 ms 31760 KB Output is correct
8 Correct 1251 ms 17772 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 512 KB Output is correct
2 Correct 7 ms 512 KB Output is correct
3 Correct 6 ms 512 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3826 ms 59348 KB Output is correct
6 Correct 3396 ms 50020 KB Output is correct
7 Correct 2887 ms 40084 KB Output is correct
8 Correct 1480 ms 17748 KB Output is correct
9 Correct 809 ms 14432 KB Output is correct
10 Correct 899 ms 15700 KB Output is correct
11 Correct 863 ms 15592 KB Output is correct
12 Correct 1761 ms 31764 KB Output is correct
13 Correct 1451 ms 17688 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 512 KB Output is correct
2 Correct 4 ms 512 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 6 ms 512 KB Output is correct
5 Correct 1918 ms 29148 KB Output is correct
6 Correct 2588 ms 38548 KB Output is correct
7 Correct 3024 ms 48216 KB Output is correct
8 Correct 3818 ms 60880 KB Output is correct
9 Correct 3066 ms 41408 KB Output is correct
10 Correct 3657 ms 49460 KB Output is correct
11 Correct 3050 ms 41748 KB Output is correct
12 Correct 3567 ms 49608 KB Output is correct
13 Correct 3050 ms 41496 KB Output is correct
14 Correct 3574 ms 49480 KB Output is correct
15 Correct 1676 ms 31892 KB Output is correct
16 Correct 1476 ms 18000 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 2543 ms 33792 KB Output is correct
9 Correct 2740 ms 33804 KB Output is correct
10 Correct 2804 ms 34080 KB Output is correct
11 Correct 3224 ms 44876 KB Output is correct
12 Correct 3055 ms 40228 KB Output is correct
13 Correct 2997 ms 48108 KB Output is correct
14 Correct 1487 ms 31760 KB Output is correct
15 Correct 1251 ms 17772 KB Output is correct
16 Correct 8 ms 512 KB Output is correct
17 Correct 7 ms 512 KB Output is correct
18 Correct 6 ms 512 KB Output is correct
19 Correct 3 ms 384 KB Output is correct
20 Correct 3826 ms 59348 KB Output is correct
21 Correct 3396 ms 50020 KB Output is correct
22 Correct 2887 ms 40084 KB Output is correct
23 Correct 1480 ms 17748 KB Output is correct
24 Correct 809 ms 14432 KB Output is correct
25 Correct 899 ms 15700 KB Output is correct
26 Correct 863 ms 15592 KB Output is correct
27 Correct 1761 ms 31764 KB Output is correct
28 Correct 1451 ms 17688 KB Output is correct
29 Correct 4 ms 512 KB Output is correct
30 Correct 4 ms 512 KB Output is correct
31 Correct 5 ms 512 KB Output is correct
32 Correct 6 ms 512 KB Output is correct
33 Correct 1918 ms 29148 KB Output is correct
34 Correct 2588 ms 38548 KB Output is correct
35 Correct 3024 ms 48216 KB Output is correct
36 Correct 3818 ms 60880 KB Output is correct
37 Correct 3066 ms 41408 KB Output is correct
38 Correct 3657 ms 49460 KB Output is correct
39 Correct 3050 ms 41748 KB Output is correct
40 Correct 3567 ms 49608 KB Output is correct
41 Correct 3050 ms 41496 KB Output is correct
42 Correct 3574 ms 49480 KB Output is correct
43 Correct 1676 ms 31892 KB Output is correct
44 Correct 1476 ms 18000 KB Output is correct
45 Correct 1442 ms 22712 KB Output is correct
46 Correct 1600 ms 22876 KB Output is correct
47 Correct 1711 ms 26388 KB Output is correct
48 Correct 2901 ms 45068 KB Output is correct
49 Correct 1031 ms 17964 KB Output is correct
50 Correct 1077 ms 17780 KB Output is correct
51 Correct 1004 ms 17684 KB Output is correct
52 Correct 887 ms 17704 KB Output is correct
53 Correct 892 ms 17816 KB Output is correct
54 Correct 897 ms 17816 KB Output is correct