Submission #431083

#	Time	Username	Problem	Language	Result	Execution time	Memory
431083		Return_0	Street Lamps (APIO19_street_lamps)	C++17	100 / 100	4224 ms	280408 KiB

street_lamps

#pragma GCC optimize("Ofast,unroll-loops")
// #pragma comment(linker, "/stack:200000000")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma,tune=native")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

typedef int ll;
typedef long double ld;
typedef pair <ll, ll> pll;

#ifdef SINA
#define dbg(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1> void __f(const char* name, Arg1&& arg1) { cout << name << " : " << arg1 << std::endl; }
template <typename Arg1, typename... Args> void __f (const char* names, Arg1&& arg1, Args&&... args) {
	const char* comma = strchr(names + 1, ',');cout.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...); }
#define dbg2(x, j, n) cout<< #x << " : "; output((j), (n), x, 1); cout.flush();
#else
#define dbg(...) 0
#define dbg2(x, j, n) 0
#endif
#define SZ(x) ((ll)((x).size()))
#define File(s, t) freopen(s ".txt", "r", stdin); freopen(t ".txt", "w", stdout);
#define input(j, n, a) for (int _i = (j); _i < (n)+(j); _i++) cin>> a[_i];
#define output(j, n, a, t) for (int _i = (j); _i < (n)+(j); _i++) cout<< a[_i] << (((t) && _i != (n)+(j)-1)? ' ' : '\n');
#define kill(x) return cout<< (x) << endl, 0
#define cl const ll
#define fr first
#define sc second
#define lc (v << 1)
#define rc (lc | 1)
#define mid ((l + r) >> 1)
#define All(x) (x).begin(), (x).end()

cl inf = sizeof(ll) == 4 ? (1e9 + 10) : (3e18), mod = 1e9 + 7, MOD = 998244353;

template <class A,class B> ostream& operator << (ostream& out,const pair<A,B>&a){return out<<'('<<a.first<<", "<<a.second<<')';}
template <class A> ostream& operator << (ostream& out, const vector<A> &a) {
	out<< '['; for (int i = -1; ++i < int(a.size());) out<< a[i] << (i + 1 < int(a.size()) ? ", " : ""); return out<<']'; }
template <class T, typename _t = less <T> > using Tree = tree <T, null_type, _t, rb_tree_tag, tree_order_statistics_node_update>;

cl N = 3e5 + 7;

ll n, q;
set <ll> off;
gp_hash_table <ll, ll> fen [N];
string s;

inline void add (ll l, cl &r, cl &x) { for (; l; l -= l & -l) for (ll i = r; i; i -= i & -i) fen[l][i] += x; }
inline void add_to_rect (cl &a, cl &b, cl &c, cl &d, cl &x) {
	add(b, d, x); add(a - 1, d, -x); add(b, c - 1, -x); add(a - 1, c - 1, x);
}
inline ll ask_sum (ll l, cl &r) {
	ll ret = 0;
	for (; l < N; l += l & -l) for (ll i = r; i < N; i += i & -i) if (fen[l].find(i) != fen[l].end()) ret += fen[l][i];
	return ret;
}

int main ()
{
	ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);

	cin>> n >> q >> s;
	off.insert(0); off.insert(n + 1);
	for (ll i = 0; i < n; i++) if (s[i] == '0') off.insert(i + 1);

	for (ll i = 1; i <= q; i++) {
		string tp; cin>> tp;
		if (tp == "toggle") {
			ll x; cin>> x;
			ll l = *(--off.lower_bound(x)) + 1, r = *off.upper_bound(x);
			if (off.count(x)) {
				off.erase(x);
				add_to_rect(l, x, x + 1, r, -i);
			} else {
				off.insert(x);
				add_to_rect(l, x, x + 1, r, i);
			}
		} else {
			ll l, r; cin>> l >> r;
			cout<< ask_sum(l, r) + (off.lower_bound(l) == off.upper_bound(r - 1) ? i : 0) << '\n';
		}
	}

	cerr<< "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";

	return 0;
}
/*
5 7
11011
query 1 2
query 1 2
query 1 6
query 3 4
toggle 3
query 3 4
query 1 6

*/

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20