Submission #569172

#	Time	Username	Problem	Language	Result	Execution time	Memory
569172		aryan12	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	5041 ms	524288 KiB

street_lamps

#include <bits/stdc++.h>
using namespace std;
#define int long long

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

void Solve() 
{
	int n, q;
	cin >> n >> q;
	vector<vector<int> > dist(n + 1, vector<int> (n + 1, 0));
	string s;
	cin >> s;
	for(int i = 0; i <= n; i++) 
	{
		bool flag = true;
		for(int j = i + 1; j <= n; j++)
		{
			if(s[j - 1] == '0') flag = false;
			dist[i][j] = (flag) ? dist[i][j] + 1 : dist[i][j];
		}
	}
	for(int i = 0; i < q; i++)
	{
		string command;
		cin >> command;
		if(command == "query")
		{
			int a, b;
			cin >> a >> b;
			a--, b--;
			cout << dist[a][b] << "\n";
		}
		else
		{
			int idx;
			cin >> idx;
			idx--;
			s[idx] = (s[idx] == '1') ? '0' : '1';
		}
		for(int j = 0; j <= n; j++)
		{
			bool flag = true;
			for(int k = j + 1; k <= n; k++)
			{
				if(s[k - 1] == '0') flag = false;
				dist[j][k] = (flag) ? dist[j][k] + 1 : dist[j][k];
			}
		}
	}
}

int32_t main() 
{
	auto begin = std::chrono::high_resolution_clock::now();
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;
	// cin >> t;
	for(int i = 1; i <= t; i++) 
	{
		//cout << "Case #" << i << ": ";
		Solve();
	}
	auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
	return 0;
}

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