Submission #673436

#	Time	Username	Problem	Language	Result	Execution time	Memory
673436		ghostwriter	Street Lamps (APIO19_street_lamps)	C++17	0 / 100	5049 ms	524288 KiB

street_lamps

// #pragma GCC optimize ("Ofast")
// #pragma GCC target ("avx2")
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
    #include <debug.h>
#else
    #define debug(...)
#endif
#define ft front
#define bk back
#define st first
#define nd second
#define ins insert
#define ers erase
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define bg begin
#define ed end
#define all(x) (x).bg(), (x).ed()
#define sz(x) (int)(x).size()
// #define int long long
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
#define FOR(i, l, r) for (int i = (l); i <= (r); ++i)
#define FOS(i, r, l) for (int i = (r); i >= (l); --i)
#define FRN(i, n) for (int i = 0; i < (n); ++i)
#define FSN(i, n) for (int i = (n) - 1; i >= 0; --i)
#define EACH(i, x) for (auto &i : (x))
#define WHILE while
template<typename T> T gcd(T a, T b) { T d2 = (a | b) & -(a | b); a /= d2; b /= d2; WHILE(b) { a = a % b; swap(a, b); } return a * d2; }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
void _assert(bool statement) { if (statement) return; cerr << "\n>> Assertion failed!\n"; exit(0); }
void _assert(bool statement, const str &message) { if (statement) return; cerr << "\n>> Assertion failed: " << message << '\n'; exit(0); }
void _error(const str &message) { cerr << "\n>> Error: " << message << '\n'; exit(0); }
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
----------------------------------------------------------------
    END OF TEMPLATE
----------------------------------------------------------------
    Tran The Bao - ghostwriter
    Training for VOI23 gold medal
----------------------------------------------------------------
    GOAT
----------------------------------------------------------------
*/
struct Query {
	str type;
	int i, a, b;
	Query() {}
};
const int N = 3e5 + 5;
int n, q;
char s[N];
Query query[N];
void input(int test_id) {
	cin >> n >> q;
	FOR(i, 1, n) cin >> s[i];
	// FOR(i, 1, q) {
	// 	cin >> query[i].type;
	// 	if (query[i].type == "toggle") cin >> query[i].i;
	// 	else cin >> query[i].a >> query[i].b;
	// }
}
namespace subtask1 {
	vector<str> versions;
	bool check_valid() {
		if (n <= 100 && q <= 100) return 1;
		return 0;
	}
	bool check(const str &s, int l, int r) {
		str tmp = s.substr(l - 1, r - l + 1);
		EACH(i, tmp)
			if (i != '1')
				return 0;
		return 1;
	}
	void solve() {
		str s1(n, '0');
		FOR(i, 1, n) s1[i - 1] = s[i];
		versions.pb(s1);
		FOR(j, 1, q) {
			cin >> query[j].type;
			if (query[j].type == "toggle") cin >> query[j].i;
			else cin >> query[j].a >> query[j].b;
			str tmp = versions.bk();
			if (query[j].type == "toggle") {
				int i = query[j].i;
				tmp[i - 1] = 1 - tmp[i - 1] + 2 * '0';
			}
			else {
				int a = query[j].a, b = query[j].b, rs = 0;
				EACH(hour, versions) rs += check(hour, a, b);
				cout << rs << '\n';
			}
			versions.pb(tmp);
		}
	}
}
namespace subtask2 {
	int f[N];
	vi d[N];
	bool check_valid() {
		FOR(i, 1, q)
			if (query[i].type == "query" && query[i].b - query[i].a != 1)
				return 0;
		return 1;
	}
	void solve() {
		FOR(i, 1, n) d[i].pb(0);
		FOR(j, 1, q)
			if (query[j].type == "toggle") {
				int i = query[j].i;
				bool okp = (s[i - 1] - '0' && s[i] - '0'), okn = (s[i] - '0' && s[i + 1] - '0');
				s[i] = 1 - s[i] + 2 * '0';
				if (okp) f[i - 1] += j - d[i - 1].bk();
				if (okn) f[i] += j - d[i].bk();
				d[i - 1].pb(j);
				d[i].pb(j);
			}
			else {
				int a = query[j].a, rs = f[a];
				if (s[a] == '1' && s[a + 1] == '1') rs += j - d[a].bk() + 1;
				cout << rs << '\n';
			}
	}
}
void solve(int test_id) {
	vector<str> versions;
	cin >> n >> q;
	str s;
	cin >> s;
	versions.pb(s);
	FOR(j, 1, q) {
		str type;
		cin >> type;
		str tmp = versions.bk();
		if (type == "toggle") {
			int i;
			cin >> i;
			tmp[i - 1] ^= 1;
		}
		else {
			int a, b, rs = 0;
			cin >> a >> b;
			--a; --b;
			FRN(i, j) {
				str tmp1 = versions[i].substr(a, b - a + 1);
				bool ok = 1;
				EACH(z, tmp1) ok &= (z == '1');
				rs += ok;
			}
			cout << rs << '\n';
		}
		versions.pb(tmp);
	}
	// if (subtask1::check_valid()) {
	// 	subtask1::solve();
	// 	return;
	// }
	// if (subtask2::check_valid()) {
	// 	subtask2::solve();
	// 	return;
	// }
}
void reinit(int test_id) {

}
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);
    int test_num = 1;
    // cin >> test_num; // comment if the problem does not requires multitest
    FOR(i, 1, test_num) {
        // input(i); // input in noninteractive problems for case #i
        solve(i); // main function to solve case #i
        reinit(i); // reinit global data to default used in case #i
    }
    #ifdef LOCAL
        cerr << "\nTime: " << setprecision(5) << fixed << (ldb)clock() / CLOCKS_PER_SEC << "ms.\n";
    #endif
    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
----------------------------------------------------------------
From Benq:
    stuff you should look for
        * int overflow, array bounds
        * special cases (n=1?)
        * do smth instead of nothing and stay organized
        * WRITE STUFF DOWN
        * DON'T GET STUCK ON ONE APPROACH
----------------------------------------------------------------
*/

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20