oj.uz

Submission #556569

# Submission time Handle Problem Language Result Execution time Memory
556569 2022-05-03T11:06:29 Z vovamr Street Lamps (APIO19_street_lamps) C++17
100 / 100
 4852 ms 233624 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("tune=native")
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fi first
#define se second
#define ll long long
#define ld long double
#define sz(x) ((int)(x).size())
#define all(x) 	(x).begin(), (x).end()
#define pb push_back
#define mpp make_pair
#define ve vector
using namespace std;
using namespace __gnu_pbds;
template<class T> using oset = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
const ll inf = 1e18; const int iinf = 1e9;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
template <typename T> inline bool chmin(T& a, T b) { return (a > b ? a = b, 1 : 0); }
template <typename T> inline bool chmax(T& a, T b) { return (a < b ? a = b, 1 : 0); }

const int N = 3e5 + 100;
ve<int> f[3][N], q[3][N]; int nn;
inline void pupd(int id, int x, int y) { x += 2; for (; x < nn; x += x & -x) q[id][x].pb(y); }
inline void pget(int id, int x, int y) { x += 2; for (; x; x -= x & -x) q[id][x].pb(y); }
inline void psum(int id, int lx, int ry) { pget(id, lx, nn - 5); pget(id, lx, ry - 1); }
inline void prep(int id) {
	for (int i = 0; i < nn; ++i) {
		sort(all(q[id][i]));
		q[id][i].erase(unique(all(q[id][i])), q[id][i].end());
		f[id][i].resize(sz(q[id][i]) + 10);
	}
}
inline void upd(int id, int x, int y, int d) { x += 2;
	for (; x < nn; x += x & -x) {
		int i = lower_bound(all(q[id][x]), y) - q[id][x].begin() + 2;
		for (; i < sz(f[id][x]); i += i & -i) f[id][x][i] += d;
	}
}
inline int get(int id, int x, int y) {
	if (y < 0) return 0;
	x += 2; int ans = 0;
	for (; x; x -= x & -x) {
		int i = lower_bound(all(q[id][x]), y) - q[id][x].begin() + 2;
		for (; i; i -= i & -i) ans += f[id][x][i];
	} return ans;
}
inline int sum(int id, int lx, int ry) { return get(id, lx, nn - 5) - get(id, lx, ry - 1); }
inline void begin(int n) { nn = n + 10; }

inline void solve() {
	int n, q;
	cin >> n >> q;
	string s; cin >> s;

	begin(n);
	string ini = s;

	map<int,array<int,3>> mp; int ls = -1;
	for (int i = n - 1; ~i; --i) {
		if (s[i] == '1' && ls == -1) ls = i;
		else if (s[i] == '0') {
			if (i + 1 < n && s[i + 1] == '1') {
				mp[i + 1] = {ls, 0, iinf};
			} ls = -1;
		}
	}
	if (s[0] == '1') mp[0] = {ls, 0, iinf};

	auto Padd_seg = [&](int lt, int rt, int l, int r) {
		pupd(0, l, r);
		if (rt == iinf) pupd(1, l, r);
		else pupd(2, l, r);
	};

	auto add_seg = [&](int lt, int rt, int l, int r, bool fl = 0) {
		if (fl) upd(0, l, r, -lt);
		if (rt == iinf) upd(1, l, r, +1);
		else upd(2, l, r, +(rt + 1));
	};
	auto del_seg = [&](int lt, int rt, int l, int r, bool fl = 0) {
		if (fl) upd(0, l, r, +lt);
		if (rt == iinf) upd(1, l, r, -1);
		else upd(2, l, r, -(rt + 1));
	};

	for (auto &[l, __] : mp) {
		auto &[r, lt, rt] = __;
		Padd_seg(lt, rt, l, r);
	}

	auto Pupd = [&](int pos, int curtime) {
		if (s[pos] == '0') {
			pii add = {pos, pos};
			auto it = mp.upper_bound(pos);
			if (it != mp.end()) {
				auto [r, lt, rt] = it->se;
				if (it->fi == pos + 1) {
					add = {add.fi, r};
					Padd_seg(lt, curtime - 1, it->fi, r);
					mp.erase(it);
				}
			}
			it = mp.upper_bound(pos);
			if (it != mp.begin()) {
				--it;
				auto [r, lt, rt] = it->se;
				if (r == pos - 1) {
					add = {it->fi, add.se};
					Padd_seg(lt, curtime - 1, it->fi, r);
					mp.erase(it);
				}
			}
			Padd_seg(curtime, iinf, add.fi, add.se);
			mp[add.fi] = {add.se, curtime, iinf};
		}
		else {
			auto it = mp.upper_bound(pos); --it;
			int l = it->fi; auto [r, lt, rt] = it->se;

			Padd_seg(lt, curtime - 1, l, r);
			mp.erase(it);

			if (l != r) {
				if (pos == l) Padd_seg(curtime, iinf, l + 1, r), mp[l + 1] = {r, curtime, iinf};
				else if (pos == r) Padd_seg(curtime, iinf, l, r - 1), mp[l] = {r - 1, curtime, iinf};
				else {
					Padd_seg(curtime, iinf, l, pos - 1);
					Padd_seg(curtime, iinf, pos + 1, r);
					mp[l] = {pos - 1, curtime, iinf};
					mp[pos + 1] = {r, curtime, iinf};
				}
			}
		}
		s[pos] = (s[pos] == '0' ? '1' : '0');
	};

	auto upd = [&](int pos, int curtime) {
		if (s[pos] == '0') {
			pii add = {pos, pos};
			auto it = mp.upper_bound(pos);
			if (it != mp.end()) {
				auto [r, lt, rt] = it->se;
				if (it->fi == pos + 1) {
					add = {add.fi, r};
					del_seg(lt, rt, it->fi, r);
					add_seg(lt, curtime - 1, it->fi, r);
					mp.erase(it);
				}
			}
			it = mp.upper_bound(pos);
			if (it != mp.begin()) {
				--it;
				auto [r, lt, rt] = it->se;
				if (r == pos - 1) {
					add = {it->fi, add.se};
					del_seg(lt, rt, it->fi, r);
					add_seg(lt, curtime - 1, it->fi, r);
					mp.erase(it);
				}
			}
			add_seg(curtime, iinf, add.fi, add.se, 1);
			mp[add.fi] = {add.se, curtime, iinf};
		}
		else {
			auto it = mp.upper_bound(pos); --it;
			int l = it->fi; auto [r, lt, rt] = it->se;

			del_seg(lt, rt, l, r);
			add_seg(lt, curtime - 1, l, r);
			mp.erase(it);

			if (l != r) {
				if (pos == l) add_seg(curtime, iinf, l + 1, r, 1), mp[l + 1] = {r, curtime, iinf};
				else if (pos == r) add_seg(curtime, iinf, l, r - 1, 1), mp[l] = {r - 1, curtime, iinf};
				else {
					add_seg(curtime, iinf, l, pos - 1, 1);
					add_seg(curtime, iinf, pos + 1, r, 1);
					mp[l] = {pos - 1, curtime, iinf};
					mp[pos + 1] = {r, curtime, iinf};
				}
			}
		}
		s[pos] = (s[pos] == '0' ? '1' : '0');
	};

	int ttm = 0;
	ve<array<int,3>> que(q);
	for (int i = 0; i < q; ++i) { ttm++;
		string e; cin >> e;
		que[i][0] = (e == "toggle" ? 0 : 1);

		if (e == "toggle") {
			int pos;
			cin >> pos, --pos;

			Pupd(pos, ttm++);
			que[i][1] = pos;
			que[i][2] = -1;
		}
		else {
			int l, r;
			cin >> l >> r, --l, ----r;
			que[i][1] = l, que[i][2] = r;
			psum(0, l, r);
			psum(1, l, r);
			psum(2, l, r);
		}
	}

	prep(0), prep(1), prep(2);
	s = ini; mp.clear(); ls = -1;

	for (int i = n - 1; ~i; --i) {
		if (s[i] == '1' && ls == -1) ls = i;
		else if (s[i] == '0') {
			if (i + 1 < n && s[i + 1] == '1') {
				mp[i + 1] = {ls, 0, iinf};
			} ls = -1;
		}
	}
	if (s[0] == '1') mp[0] = {ls, 0, iinf};
	for (auto &[l, __] : mp) add_seg(0, iinf, l, __[0], 1);

	int tm = 0;
	for (auto &[e, l, r] : que) { ++tm;
		if (!e) upd(l, tm);
		else {
			int ans = 0;
			ans += sum(2, l, r);
			ans += sum(0, l, r);
			ans += tm * sum(1, l, r);
			cout << ans << '\n';
		}
	}
}

signed main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	int q = 1; // cin >> q;
	while (q--) solve();
	cerr << fixed << setprecision(3) << "Time execution: " << (double)clock() / CLOCKS_PER_SEC << endl;
}
/**
5 7
11011
query 1 2
query 1 2
query 1 6
query 3 4
toggle 3
query 3 5
query 1 6
*/

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 42580 KB Output is correct
2 Correct 23 ms 42516 KB Output is correct
3 Correct 22 ms 42580 KB Output is correct
4 Correct 23 ms 42516 KB Output is correct
5 Correct 24 ms 42636 KB Output is correct
6 Correct 22 ms 42540 KB Output is correct
7 Correct 23 ms 42580 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 506 ms 74472 KB Output is correct
2 Correct 651 ms 76952 KB Output is correct
3 Correct 1295 ms 93744 KB Output is correct
4 Correct 4273 ms 218864 KB Output is correct
5 Correct 4409 ms 225260 KB Output is correct
6 Correct 4113 ms 216732 KB Output is correct
7 Correct 3305 ms 210892 KB Output is correct
8 Correct 3344 ms 213028 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 43008 KB Output is correct
2 Correct 27 ms 42960 KB Output is correct
3 Correct 27 ms 42964 KB Output is correct
4 Correct 25 ms 42904 KB Output is correct
5 Correct 4389 ms 197636 KB Output is correct
6 Correct 4695 ms 222096 KB Output is correct
7 Correct 4852 ms 233624 KB Output is correct
8 Correct 3371 ms 219812 KB Output is correct
9 Correct 318 ms 70052 KB Output is correct
10 Correct 373 ms 72080 KB Output is correct
11 Correct 371 ms 72920 KB Output is correct
12 Correct 3320 ms 218016 KB Output is correct
13 Correct 3393 ms 219436 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 42964 KB Output is correct
2 Correct 26 ms 42964 KB Output is correct
3 Correct 28 ms 43028 KB Output is correct
4 Correct 25 ms 43020 KB Output is correct
5 Correct 3545 ms 232192 KB Output is correct
6 Correct 3803 ms 225324 KB Output is correct
7 Correct 4062 ms 215656 KB Output is correct
8 Correct 4635 ms 204372 KB Output is correct
9 Correct 746 ms 76448 KB Output is correct
10 Correct 517 ms 67340 KB Output is correct
11 Correct 735 ms 76472 KB Output is correct
12 Correct 514 ms 67536 KB Output is correct
13 Correct 751 ms 76388 KB Output is correct
14 Correct 529 ms 67760 KB Output is correct
15 Correct 3280 ms 212484 KB Output is correct
16 Correct 3323 ms 213484 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 42580 KB Output is correct
2 Correct 23 ms 42516 KB Output is correct
3 Correct 22 ms 42580 KB Output is correct
4 Correct 23 ms 42516 KB Output is correct
5 Correct 24 ms 42636 KB Output is correct
6 Correct 22 ms 42540 KB Output is correct
7 Correct 23 ms 42580 KB Output is correct
8 Correct 506 ms 74472 KB Output is correct
9 Correct 651 ms 76952 KB Output is correct
10 Correct 1295 ms 93744 KB Output is correct
11 Correct 4273 ms 218864 KB Output is correct
12 Correct 4409 ms 225260 KB Output is correct
13 Correct 4113 ms 216732 KB Output is correct
14 Correct 3305 ms 210892 KB Output is correct
15 Correct 3344 ms 213028 KB Output is correct
16 Correct 28 ms 43008 KB Output is correct
17 Correct 27 ms 42960 KB Output is correct
18 Correct 27 ms 42964 KB Output is correct
19 Correct 25 ms 42904 KB Output is correct
20 Correct 4389 ms 197636 KB Output is correct
21 Correct 4695 ms 222096 KB Output is correct
22 Correct 4852 ms 233624 KB Output is correct
23 Correct 3371 ms 219812 KB Output is correct
24 Correct 318 ms 70052 KB Output is correct
25 Correct 373 ms 72080 KB Output is correct
26 Correct 371 ms 72920 KB Output is correct
27 Correct 3320 ms 218016 KB Output is correct
28 Correct 3393 ms 219436 KB Output is correct
29 Correct 25 ms 42964 KB Output is correct
30 Correct 26 ms 42964 KB Output is correct
31 Correct 28 ms 43028 KB Output is correct
32 Correct 25 ms 43020 KB Output is correct
33 Correct 3545 ms 232192 KB Output is correct
34 Correct 3803 ms 225324 KB Output is correct
35 Correct 4062 ms 215656 KB Output is correct
36 Correct 4635 ms 204372 KB Output is correct
37 Correct 746 ms 76448 KB Output is correct
38 Correct 517 ms 67340 KB Output is correct
39 Correct 735 ms 76472 KB Output is correct
40 Correct 514 ms 67536 KB Output is correct
41 Correct 751 ms 76388 KB Output is correct
42 Correct 529 ms 67760 KB Output is correct
43 Correct 3280 ms 212484 KB Output is correct
44 Correct 3323 ms 213484 KB Output is correct
45 Correct 216 ms 58016 KB Output is correct
46 Correct 367 ms 63452 KB Output is correct
47 Correct 2190 ms 131108 KB Output is correct
48 Correct 4376 ms 224660 KB Output is correct
49 Correct 392 ms 75460 KB Output is correct
50 Correct 417 ms 74784 KB Output is correct
51 Correct 421 ms 76996 KB Output is correct
52 Correct 527 ms 86308 KB Output is correct
53 Correct 538 ms 86644 KB Output is correct
54 Correct 550 ms 86564 KB Output is correct