oj.uz

Submission #871146

# Submission time Handle Problem Language Result Execution time Memory
871146 2023-11-10T04:20:54 Z marvinthang Street Lamps (APIO19_street_lamps) C++17
100 / 100
 635 ms 48440 KB 
/*************************************
*    author: marvinthang             *
*    created: 10.11.2023 08:32:34    *
*************************************/

#include <bits/stdc++.h>

using namespace std;

#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i-- > 0; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif

template <class U, class V> scan_op(pair <U, V>)  { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }

// index from 0
template <class T> struct Fenwick {
    int n; vector <T> bit;
    Fenwick(int _n = 0): n(_n), bit(n + 1, 0) {}
    void reset(void) { fill(bit.begin(), bit.end(), 0); }
    void resize(int _n) { bit.assign(_n + 1, 0); }
    void update(int i, T val) { for (++i; i <= n; i += i & -i) bit[i] += val; }
    T get(int i) {
        if (i < 0) return 0;
        T res(0);
        for (i = min(i + 1, n); i > 0; i &= i - 1) res += bit[i];
        return res;
    }
    int upper_bound(T val) {
        int res = 0;
        for (int i = __lg(n); i >= 0; --i) 
            if ((res | MASK(i)) <= n && val >= bit[res | MASK(i)]) res |= MASK(i), val -= bit[res];
        return res;
    }
    int lower_bound(T val) {
        int res = 0;
        for (int i = __lg(n); i >= 0; --i)
            if ((res | MASK(i)) <= n && val > bit[res | MASK(i)]) res |= MASK(i), val -= bit[res];
        return res;
    }
};

// end of template

void process(void) {
	int n, q; string s; cin >> n >> q >> s;
	map <int, int> mp;
	vector <array<int, 3>> queries(q);
	REP(i, q) {
		string s; cin >> s >> queries[i][1];
		queries[i][0] = s[0] == 'q';
		--queries[i][1];
		if (queries[i][0]) {
			cin >> queries[i][2];
			queries[i][2] -= 2;
		}
	}
	Fenwick <long long> bit_sum(n), bit_cnt(n);
	vector <long long> sum(q);
	vector <bool> exist(q);
	function <vector <array <int, 3>>(int, int, const vector <int> &)> solve = [&] (int l, int r, const vector <int> &ask) {
		if (r - l == 1) {
			vector <array <int, 3>> events;
			auto addEvent = [&] (int x, int y, int v) {
				events.insert(lower_bound(ALL(events), array{x, y, v}), array{x, y, v});
			};
			if (!l) {
				REP(i, n) if (s[i] == '1') {
					int j = i;
					while (j < n && s[i] == s[j]) ++j;
					mp[i] = j;
					events.push_back(array{i, j, 1});
					if (queries[l][0] && i <= queries[l][1] && queries[l][2] < j) sum[l] = 1;
					i = j;
				}
				REP(i, n) if (s[i] == '1') bit_cnt.update(i, +1);
			}
			if (!queries[l][0]) {
				int u = queries[l][1];
				if (s[u] == '0') {
					auto it = mp.lower_bound(u);
					int r = u + 1;
					if (u + 1 < n && s[u + 1] == '1') {
						r = it->se;
						addEvent(u + 1, r, l);
						it = mp.erase(it);
					}
					if (u && s[u - 1] == '1') {
						it = prev(it);
						addEvent(it->fi, it->se, l);
						it->se = r;
						addEvent(it->fi, it->se, -l);
					} else {
						mp[u] = r;
						addEvent(u, r, -l);
					}
					s[u] = '1';
					bit_cnt.update(u, +1);
				} else {
					auto it = prev(mp.upper_bound(u));
					addEvent(it->fi, it->se, l);
					if (u + 1 < it->se) {
						mp[u + 1] = it->se;
						addEvent(u + 1, it->se, -l);
					}
					if (it->fi < u) {
						it->se = u;
						addEvent(it->fi, u, -l);
					} else mp.erase(it);
					s[u] = '0';
					bit_cnt.update(u, -1);
				}
			} else {
				int x = queries[l][1], y = queries[l][2];
				exist[l] = bit_cnt.get(y) - bit_cnt.get(x - 1) == y - x + 1;
			}
			return events;
		}
		int m = l + r >> 1;
		vector <int> ask_left, ask_right;
		for (int i: ask) (i < m ? ask_left : ask_right).push_back(i);
		auto left = solve(l, m, ask_left);
		int j = 0;
		for (int i: ask_right) {
			while (j < left.size() && left[j][0] <= queries[i][1]) {
				bit_sum.update(left[j][0], left[j][2]);
				bit_sum.update(left[j][1], -left[j][2]);
				++j;
			}
			sum[i] += bit_sum.get(queries[i][2]);
		}
		while (j--) {
			bit_sum.update(left[j][0], -left[j][2]);
			bit_sum.update(left[j][1], left[j][2]);
		}

		auto right = solve(m, r, ask_right);
		vector <array <int, 3>> events;
		merge(ALL(left), ALL(right), back_inserter(events));
		return events;
	};
	vector <int> ask;
	REP(i, q) if (queries[i][0]) ask.push_back(i);
	sort(ALL(ask), [&] (int a, int b) { return queries[a][1] < queries[b][1]; });
	solve(0, q, ask);
	REP(i, q) if (queries[i][0]) cout << exist[i] * i + sum[i] << '\n';
}

int main(void) {
	ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
	file("street_lamps");
	// int t; cin >> t; while (t--)
	process();
	// cerr << "Time elapsed: " << TIME << " s.\n";
	return (0^0);
}

Compilation message

street_lamps.cpp: In lambda function:
street_lamps.cpp:146:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  146 |   int m = l + r >> 1;
      |           ~~^~~
street_lamps.cpp:152:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 3> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  152 |    while (j < left.size() && left[j][0] <= queries[i][1]) {
      |           ~~^~~~~~~~~~~~~
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:178:2: note: in expansion of macro 'file'
  178 |  file("street_lamps");
      |  ^~~~
street_lamps.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:178:2: note: in expansion of macro 'file'
  178 |  file("street_lamps");
      |  ^~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 456 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 268 ms 24292 KB Output is correct
2 Correct 295 ms 24468 KB Output is correct
3 Correct 352 ms 26360 KB Output is correct
4 Correct 588 ms 39264 KB Output is correct
5 Correct 570 ms 38456 KB Output is correct
6 Correct 326 ms 38648 KB Output is correct
7 Correct 219 ms 21508 KB Output is correct
8 Correct 229 ms 24028 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 459 ms 45444 KB Output is correct
6 Correct 635 ms 48440 KB Output is correct
7 Correct 562 ms 37648 KB Output is correct
8 Correct 242 ms 21784 KB Output is correct
9 Correct 113 ms 11980 KB Output is correct
10 Correct 125 ms 12740 KB Output is correct
11 Correct 125 ms 14200 KB Output is correct
12 Correct 234 ms 21764 KB Output is correct
13 Correct 237 ms 21512 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 303 ms 28712 KB Output is correct
6 Correct 314 ms 32320 KB Output is correct
7 Correct 337 ms 38624 KB Output is correct
8 Correct 339 ms 41208 KB Output is correct
9 Correct 210 ms 30104 KB Output is correct
10 Correct 214 ms 30944 KB Output is correct
11 Correct 216 ms 30652 KB Output is correct
12 Correct 218 ms 30696 KB Output is correct
13 Correct 212 ms 30832 KB Output is correct
14 Correct 212 ms 32072 KB Output is correct
15 Correct 241 ms 21468 KB Output is correct
16 Correct 239 ms 22180 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 456 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 268 ms 24292 KB Output is correct
9 Correct 295 ms 24468 KB Output is correct
10 Correct 352 ms 26360 KB Output is correct
11 Correct 588 ms 39264 KB Output is correct
12 Correct 570 ms 38456 KB Output is correct
13 Correct 326 ms 38648 KB Output is correct
14 Correct 219 ms 21508 KB Output is correct
15 Correct 229 ms 24028 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 459 ms 45444 KB Output is correct
21 Correct 635 ms 48440 KB Output is correct
22 Correct 562 ms 37648 KB Output is correct
23 Correct 242 ms 21784 KB Output is correct
24 Correct 113 ms 11980 KB Output is correct
25 Correct 125 ms 12740 KB Output is correct
26 Correct 125 ms 14200 KB Output is correct
27 Correct 234 ms 21764 KB Output is correct
28 Correct 237 ms 21512 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 303 ms 28712 KB Output is correct
34 Correct 314 ms 32320 KB Output is correct
35 Correct 337 ms 38624 KB Output is correct
36 Correct 339 ms 41208 KB Output is correct
37 Correct 210 ms 30104 KB Output is correct
38 Correct 214 ms 30944 KB Output is correct
39 Correct 216 ms 30652 KB Output is correct
40 Correct 218 ms 30696 KB Output is correct
41 Correct 212 ms 30832 KB Output is correct
42 Correct 212 ms 32072 KB Output is correct
43 Correct 241 ms 21468 KB Output is correct
44 Correct 239 ms 22180 KB Output is correct
45 Correct 146 ms 15352 KB Output is correct
46 Correct 176 ms 15576 KB Output is correct
47 Correct 294 ms 20320 KB Output is correct
48 Correct 553 ms 38772 KB Output is correct
49 Correct 142 ms 14532 KB Output is correct
50 Correct 143 ms 15224 KB Output is correct
51 Correct 147 ms 14020 KB Output is correct
52 Correct 149 ms 15556 KB Output is correct
53 Correct 147 ms 15552 KB Output is correct
54 Correct 146 ms 15552 KB Output is correct